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Vulnerability details: VCID-438g-26cy-e3fj
Vulnerability ID VCID-438g-26cy-e3fj
Aliases CVE-2026-27621
GHSA-xfvg-8v67-j7wp
Summary TypiCMS is a multilingual content management system based on the Laravel framework. A Stored Cross-Site Scripting (XSS) vulnerability exists in the file upload module of TypiCMS prior to version 16.1.7. The application allows users with file upload permissions to upload SVG files. While there is a MIME type validation, the content of the SVG file is not sanitized. An attacker can upload a specially crafted SVG file containing malicious JavaScript code. When another user (such as an administrator) views or accesses this file through the application, the script executes in their browser, leading to a compromise of that user's session. The issue is exacerbated by a bug in the SVG parsing logic, which can cause a 500 error if the uploaded SVG does not contain a `viewBox` attribute. However, this does not mitigate the XSS vulnerability, as an attacker can easily include a valid `viewBox` attribute in their malicious payload. Version 16.1.7 of TypiCMS Core fixes the issue.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00039 https://api.first.org/data/v1/epss?cve=CVE-2026-27621
epss 0.00039 https://api.first.org/data/v1/epss?cve=CVE-2026-27621
epss 0.00039 https://api.first.org/data/v1/epss?cve=CVE-2026-27621
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-xfvg-8v67-j7wp
cvssv4 6.8 https://github.com/TypiCMS/Core
generic_textual MODERATE https://github.com/TypiCMS/Core
cvssv4 6.8 https://github.com/TypiCMS/Core/commit/d480a0be1e8e7c0600bb9a325bb11920ee66497d
generic_textual MODERATE https://github.com/TypiCMS/Core/commit/d480a0be1e8e7c0600bb9a325bb11920ee66497d
ssvc Track https://github.com/TypiCMS/Core/commit/d480a0be1e8e7c0600bb9a325bb11920ee66497d
cvssv3.1_qr MODERATE https://github.com/TypiCMS/Core/security/advisories/GHSA-xfvg-8v67-j7wp
cvssv4 6.8 https://github.com/TypiCMS/Core/security/advisories/GHSA-xfvg-8v67-j7wp
generic_textual MODERATE https://github.com/TypiCMS/Core/security/advisories/GHSA-xfvg-8v67-j7wp
ssvc Track https://github.com/TypiCMS/Core/security/advisories/GHSA-xfvg-8v67-j7wp
cvssv4 6.8 https://nvd.nist.gov/vuln/detail/CVE-2026-27621
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2026-27621
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-27621
https://github.com/TypiCMS/Core
CVE-2026-27621 https://nvd.nist.gov/vuln/detail/CVE-2026-27621
d480a0be1e8e7c0600bb9a325bb11920ee66497d https://github.com/TypiCMS/Core/commit/d480a0be1e8e7c0600bb9a325bb11920ee66497d
GHSA-xfvg-8v67-j7wp https://github.com/advisories/GHSA-xfvg-8v67-j7wp
GHSA-xfvg-8v67-j7wp https://github.com/TypiCMS/Core/security/advisories/GHSA-xfvg-8v67-j7wp
No exploits are available.
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N Found at https://github.com/TypiCMS/Core
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N Found at https://github.com/TypiCMS/Core/commit/d480a0be1e8e7c0600bb9a325bb11920ee66497d
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

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passive

active

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Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2026-02-26T20:59:03Z/ Found at https://github.com/TypiCMS/Core/commit/d480a0be1e8e7c0600bb9a325bb11920ee66497d
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N Found at https://github.com/TypiCMS/Core/security/advisories/GHSA-xfvg-8v67-j7wp
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

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none

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Vector: SSVCv2/E:P/A:N/T:P/P:M/B:A/M:M/D:T/2026-02-26T20:59:03Z/ Found at https://github.com/TypiCMS/Core/security/advisories/GHSA-xfvg-8v67-j7wp
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-27621
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

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low

none

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low

none

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low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.11907
EPSS Score 0.00039
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:50:53.046343+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/27xxx/CVE-2026-27621.json 38.6.0