{"url":"http://public2.vulnerablecode.io/api/packages/791369?format=json","purl":"pkg:npm/mermaid@11.9.0","type":"npm","namespace":"","name":"mermaid","version":"11.9.0","qualifiers":{},"subpath":"","is_vulnerable":true,"next_non_vulnerable_version":"11.10.0","latest_non_vulnerable_version":"11.10.0","affected_by_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/29027?format=json","vulnerability_id":"VCID-dmks-9n4b-vkh6","summary":"Mermaid does not properly sanitize architecture diagram iconText leading to XSS\n### Summary\nIn the default configuration of mermaid 11.9.0, user supplied input for architecture diagram icons is passed to the d3 `html()` method, creating a sink for cross site scripting.\n\n### Details\nArchitecture diagram service `iconText` values are passed to the d3 `html()` method, allowing malicious users to inject arbitrary HTML and cause XSS when mermaid-js is used in it's default configuration. \n\nThe vulnerability lies here:\n\n```ts\nexport const drawServices = async function (\n  db: ArchitectureDB,\n  elem: D3Element,\n  services: ArchitectureService[]\n): Promise<number> {\n  for (const service of services) {\n    /** ... **/\n    } else if (service.iconText) {\n      bkgElem.html(\n        `<g>${await getIconSVG('blank', { height: iconSize, width: iconSize, fallbackPrefix: architectureIcons.prefix })}</g>`\n      );\n      const textElemContainer = bkgElem.append('g');\n      const fo = textElemContainer\n        .append('foreignObject')\n        .attr('width', iconSize)\n        .attr('height', iconSize);\n      const divElem = fo\n        .append('div')\n        .attr('class', 'node-icon-text')\n        .attr('style', `height: ${iconSize}px;`)\n        .append('div')\n        .html(service.iconText); // <- iconText passed into innerHTML\n       /** ... **/\n};\n};\n```\n\nThis issue was introduced with 734bde38777c9190a5a72e96421c83424442d4e4, around 15 months ago, which was released in [v11.1.0](https://github.com/mermaid-js/mermaid/releases/tag/mermaid%4011.1.0).\n\n### PoC\nRender the following diagram and observe the modified DOM.\n\n```\narchitecture-beta\n    group api(cloud)[API]\n    service db \"<img src=x onerror=\\\"document.write(`xss on ${document.domain}`)\\\">\" [Database] in api\n```\n\nHere is a PoC on mermaid.live: https://mermaid.live/edit#pako:eNo9T8FOwzAM_ZXI4rBJpWrpRtuIISF24caZZdKyxOsiLUnlJjCo-u9kQ8wX-_n5-dkjKK8ROEhSRxNQhUh4v8cghWMpOvKxZ7I3M3XyUc83L-9v2z9qQPo0CpneMwFPxnZsILU6M--QyNNKCAHaq2jRhfyL0vLZ7jwMiWd3443Q3krjpt38Mv4sgG3WMsi9HHDLjLs4CwcZdGQ08EARM7BISZMgjJdLBIQjWhTAU6nxIOMpCBBuSrJeug_v7b8yPdMdgR_kaUgo9loGXBvZkbS3LqHTSK8-ugC8LMrrEuAjnIEvlnlVL9q6rZu6Lh-rRQbfwKuyyZuybcvqIaWiqKcMfq6uRd7Uy-kXhYFzcA\n\n### Impact\nXSS on all sites that use mermaid and render user supplied diagrams without further sanitization.\n\n### Remediation\nSanitize the value of `iconText` before passing it to `html()`.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2025-54880","reference_id":"","reference_type":"","scores":[{"value":"0.00013","scoring_system":"epss","scoring_elements":"0.02318","published_at":"2026-05-05T12:55:00Z"},{"value":"0.00013","scoring_system":"epss","scoring_elements":"0.02322","published_at":"2026-05-07T12:55:00Z"},{"value":"8e-05","scoring_system":"epss","scoring_elements":"0.0077","published_at":"2026-04-07T12:55:00Z"},{"value":"8e-05","scoring_system":"epss","scoring_elements":"0.00771","published_at":"2026-04-02T12:55:00Z"},{"value":"8e-05","scoring_system":"epss","scoring_elements":"0.00769","published_at":"2026-04-08T12:55:00Z"},{"value":"8e-05","scoring_system":"epss","scoring_elements":"0.00761","published_at":"2026-04-09T12:55:00Z"},{"value":"8e-05","scoring_system":"epss","scoring_elements":"0.00757","published_at":"2026-04-18T12:55:00Z"},{"value":"8e-05","scoring_system":"epss","scoring_elements":"0.00751","published_at":"2026-04-12T12:55:00Z"},{"value":"8e-05","scoring_system":"epss","scoring_elements":"0.00753","published_at":"2026-04-16T12:55:00Z"},{"value":"8e-05","scoring_system":"epss","scoring_elements":"0.00802","published_at":"2026-04-21T12:55:00Z"},{"value":"9e-05","scoring_system":"epss","scoring_elements":"0.00917","published_at":"2026-04-29T12:55:00Z"},{"value":"9e-05","scoring_system":"epss","scoring_elements":"0.00923","published_at":"2026-04-26T12:55:00Z"},{"value":"9e-05","scoring_system":"epss","scoring_elements":"0.00918","published_at":"2026-04-24T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2025-54880"},{"reference_url":"https://github.com/mermaid-js/mermaid","reference_id":"","reference_type":"","scores":[{"value":"5.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/mermaid-js/mermaid"},{"reference_url":"https://github.com/mermaid-js/mermaid/commit/2aa83302795183ea5c65caec3da1edd6cb4791fc","reference_id":"","reference_type":"","scores":[{"value":"5.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-08-19T17:09:29Z/"}],"url":"https://github.com/mermaid-js/mermaid/commit/2aa83302795183ea5c65caec3da1edd6cb4791fc"},{"reference_url":"https://github.com/mermaid-js/mermaid/commit/734bde38777c9190a5a72e96421c83424442d4e4","reference_id":"","reference_type":"","scores":[{"value":"5.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-08-19T17:09:29Z/"}],"url":"https://github.com/mermaid-js/mermaid/commit/734bde38777c9190a5a72e96421c83424442d4e4"},{"reference_url":"https://github.com/mermaid-js/mermaid/security/advisories/GHSA-8gwm-58g9-j8pw","reference_id":"","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"5.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2025-08-19T17:09:29Z/"}],"url":"https://github.com/mermaid-js/mermaid/security/advisories/GHSA-8gwm-58g9-j8pw"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2025-54880","reference_id":"","reference_type":"","scores":[{"value":"5.1","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-54880"},{"reference_url":"https://github.com/advisories/GHSA-8gwm-58g9-j8pw","reference_id":"GHSA-8gwm-58g9-j8pw","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-8gwm-58g9-j8pw"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/69629?format=json","purl":"pkg:npm/mermaid@11.10.0","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/mermaid@11.10.0"}],"aliases":["CVE-2025-54880","GHSA-8gwm-58g9-j8pw"],"risk_score":3.1,"exploitability":"0.5","weighted_severity":"6.2","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-dmks-9n4b-vkh6"},{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/27374?format=json","vulnerability_id":"VCID-q79q-8yzx-p3f6","summary":"Mermaid improperly sanitizes sequence diagram labels leading to XSS\n### Summary\nIn the default configuration of mermaid 11.9.0, user supplied input for sequence diagram labels is passed to `innerHTML` during calculation of element size, causing XSS.\n\n### Details\nSequence diagram node labels with KaTeX delimiters are passed through `calculateMathMLDimensions`. This method passes the full label to `innerHTML` which allows allows malicious users to inject arbitrary HTML and cause XSS when mermaid-js is used in it's default configuration (with KaTeX support enabled). \n\nThe vulnerability lies here:\n\n```ts\nexport const calculateMathMLDimensions = async (text: string, config: MermaidConfig) => {\n  text = await renderKatex(text, config);\n  const divElem = document.createElement('div');\n  divElem.innerHTML = text; // XSS sink, text has not been sanitized.\n  divElem.id = 'katex-temp';\n  divElem.style.visibility = 'hidden';\n  divElem.style.position = 'absolute';\n  divElem.style.top = '0';\n  const body = document.querySelector('body');\n  body?.insertAdjacentElement('beforeend', divElem);\n  const dim = { width: divElem.clientWidth, height: divElem.clientHeight };\n  divElem.remove();\n  return dim;\n};\n```\n\nThe `calculateMathMLDimensions` method was introduced in 5c69e5fdb004a6d0a2abe97e23d26e223a059832 two years ago, which was released in [Mermaid 10.9.0](https://github.com/mermaid-js/mermaid/releases/tag/v10.9.0).\n\n### PoC\nRender the following diagram and observe the modified DOM.\n\n```\nsequenceDiagram\n    participant A as Alice<img src=\"x\" onerror=\"document.write(`xss on ${document.domain}`)\">$$\\\\text{Alice}$$\n    A->>John: Hello John, how are you?\n    Alice-)John: See you later!\n```\n\nHere is a PoC on mermaid.live: https://mermaid.live/edit#pako:eNpVUMtOwzAQ_BWzyoFKaRTyaFILiio4IK7ckA-1km1iKbaLY6spUf4dJ0AF68uOZ2dm7REqXSNQ6PHDoarwWfDGcMkUudaJGysqceLKkj3hPdl3osJ7IRvSm-qBwcCAaIXGaONRrSsnUdnobITF28PQ954lwXglai25UNNhxWAXBMyXxcGOi-3kL_5k79e73atuFSUv2HWazH1IWn0m3CC5aPf4b3p2WK--BW-4DJCOWzQ3TM0HQmiMqIFa4zAEicZv4iGMsw0D26JEBtS3NR656ywDpiYv869_11r-Ko12TQv0yLveI3eqfcjP111HUNVonrRTFuhdsVgAHWEAmuRxlG7SuEzKMi-yJAnhAjTLIk_EcbFJtuk2y9MphM8lM47KIp--AOZghtU\n\n### Impact\nXSS on all sites that use mermaid and render user supplied diagrams without further sanitization.\n\n### Remediation\nThe value of the `text` argument for the `calculateMathMLDimensions` method needs to be sanitized before getting passed on to `innerHTML`.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2025-54881","reference_id":"","reference_type":"","scores":[{"value":"0.00014","scoring_system":"epss","scoring_elements":"0.02509","published_at":"2026-04-26T12:55:00Z"},{"value":"0.00015","scoring_system":"epss","scoring_elements":"0.03418","published_at":"2026-04-21T12:55:00Z"},{"value":"0.00015","scoring_system":"epss","scoring_elements":"0.03355","published_at":"2026-04-02T12:55:00Z"},{"value":"0.00015","scoring_system":"epss","scoring_elements":"0.03367","published_at":"2026-04-04T12:55:00Z"},{"value":"0.00015","scoring_system":"epss","scoring_elements":"0.03382","published_at":"2026-04-07T12:55:00Z"},{"value":"0.00015","scoring_system":"epss","scoring_elements":"0.03387","published_at":"2026-04-08T12:55:00Z"},{"value":"0.00015","scoring_system":"epss","scoring_elements":"0.03408","published_at":"2026-04-09T12:55:00Z"},{"value":"0.00015","scoring_system":"epss","scoring_elements":"0.03366","published_at":"2026-04-11T12:55:00Z"},{"value":"0.00015","scoring_system":"epss","scoring_elements":"0.03337","published_at":"2026-04-12T12:55:00Z"},{"value":"0.00015","scoring_system":"epss","scoring_elements":"0.03314","published_at":"2026-04-13T12:55:00Z"},{"value":"0.00015","scoring_system":"epss","scoring_elements":"0.03291","published_at":"2026-04-16T12:55:00Z"},{"value":"0.00015","scoring_system":"epss","scoring_elements":"0.03301","published_at":"2026-04-18T12:55:00Z"},{"value":"0.00017","scoring_system":"epss","scoring_elements":"0.0407","published_at":"2026-04-24T12:55:00Z"},{"value":"0.00017","scoring_system":"epss","scoring_elements":"0.04122","published_at":"2026-04-29T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.06203","published_at":"2026-05-07T12:55:00Z"},{"value":"0.00022","scoring_system":"epss","scoring_elements":"0.06103","published_at":"2026-05-05T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2025-54881"},{"reference_url":"https://github.com/mermaid-js/mermaid","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://github.com/mermaid-js/mermaid"},{"reference_url":"https://github.com/mermaid-js/mermaid/commit/5c69e5fdb004a6d0a2abe97e23d26e223a059832","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-08-19T18:10:57Z/"}],"url":"https://github.com/mermaid-js/mermaid/commit/5c69e5fdb004a6d0a2abe97e23d26e223a059832"},{"reference_url":"https://github.com/mermaid-js/mermaid/commit/685516a85ec1df64cefd4fd15f26533be87d458e","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-08-19T18:10:57Z/"}],"url":"https://github.com/mermaid-js/mermaid/commit/685516a85ec1df64cefd4fd15f26533be87d458e"},{"reference_url":"https://github.com/mermaid-js/mermaid/security/advisories/GHSA-7rqq-prvp-x9jh","reference_id":"","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""},{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""},{"value":"Track","scoring_system":"ssvc","scoring_elements":"SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2025-08-19T18:10:57Z/"}],"url":"https://github.com/mermaid-js/mermaid/security/advisories/GHSA-7rqq-prvp-x9jh"},{"reference_url":"https://nvd.nist.gov/vuln/detail/CVE-2025-54881","reference_id":"","reference_type":"","scores":[{"value":"5.3","scoring_system":"cvssv4","scoring_elements":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"},{"value":"MODERATE","scoring_system":"generic_textual","scoring_elements":""}],"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-54881"},{"reference_url":"https://github.com/advisories/GHSA-7rqq-prvp-x9jh","reference_id":"GHSA-7rqq-prvp-x9jh","reference_type":"","scores":[{"value":"MODERATE","scoring_system":"cvssv3.1_qr","scoring_elements":""}],"url":"https://github.com/advisories/GHSA-7rqq-prvp-x9jh"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/69629?format=json","purl":"pkg:npm/mermaid@11.10.0","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/mermaid@11.10.0"}],"aliases":["CVE-2025-54881","GHSA-7rqq-prvp-x9jh"],"risk_score":3.1,"exploitability":"0.5","weighted_severity":"6.2","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-q79q-8yzx-p3f6"}],"fixing_vulnerabilities":[],"risk_score":"3.1","resource_url":"http://public2.vulnerablecode.io/packages/pkg:npm/mermaid@11.9.0"}