Staging Environment: Content and features may be unstable or change without notice.
Search for vulnerabilities
Vulnerability details: VCID-caaw-qhvr-nqaz
Vulnerability ID VCID-caaw-qhvr-nqaz
Aliases CVE-2026-30948
GHSA-hcj7-6gxh-24ww
Summary Parse Server vulnerable to stored cross-site scripting (XSS) via SVG file upload A stored cross-site scripting (XSS) vulnerability allows any authenticated user to upload an SVG file containing JavaScript. The file is served inline with `Content-Type: image/svg+xml` and without protective headers, causing the browser to execute embedded scripts in the Parse Server origin. This can be exploited to steal session tokens from `localStorage` and achieve account takeover. The default `fileExtensions` option blocks HTML file extensions but does not block SVG, which is a well-known XSS vector. All Parse Server deployments where file upload is enabled for authenticated users (the default) are affected.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
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 0.00021 https://api.first.org/data/v1/epss?cve=CVE-2026-30948
epss 0.00021 https://api.first.org/data/v1/epss?cve=CVE-2026-30948
epss 0.00021 https://api.first.org/data/v1/epss?cve=CVE-2026-30948
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-hcj7-6gxh-24ww
cvssv4 8.3 https://github.com/parse-community/parse-server
generic_textual HIGH https://github.com/parse-community/parse-server
cvssv4 8.3 https://github.com/parse-community/parse-server/releases/tag/8.6.17
generic_textual HIGH https://github.com/parse-community/parse-server/releases/tag/8.6.17
ssvc Track https://github.com/parse-community/parse-server/releases/tag/8.6.17
cvssv4 8.3 https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.4
generic_textual HIGH https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.4
ssvc Track https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.4
cvssv3.1_qr HIGH https://github.com/parse-community/parse-server/security/advisories/GHSA-hcj7-6gxh-24ww
cvssv4 8.3 https://github.com/parse-community/parse-server/security/advisories/GHSA-hcj7-6gxh-24ww
generic_textual HIGH https://github.com/parse-community/parse-server/security/advisories/GHSA-hcj7-6gxh-24ww
ssvc Track https://github.com/parse-community/parse-server/security/advisories/GHSA-hcj7-6gxh-24ww
cvssv4 8.3 https://nvd.nist.gov/vuln/detail/CVE-2026-30948
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2026-30948
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-30948
https://github.com/parse-community/parse-server
https://github.com/parse-community/parse-server/releases/tag/8.6.17
https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.4
CVE-2026-30948 https://nvd.nist.gov/vuln/detail/CVE-2026-30948
GHSA-hcj7-6gxh-24ww https://github.com/advisories/GHSA-hcj7-6gxh-24ww
GHSA-hcj7-6gxh-24ww https://github.com/parse-community/parse-server/security/advisories/GHSA-hcj7-6gxh-24ww
No exploits are available.
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N Found at https://github.com/parse-community/parse-server
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

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N Found at https://github.com/parse-community/parse-server/releases/tag/8.6.17
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

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-10T20:41:33Z/ Found at https://github.com/parse-community/parse-server/releases/tag/8.6.17
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N Found at https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.4
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

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-10T20:41:33Z/ Found at https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.4
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N Found at https://github.com/parse-community/parse-server/security/advisories/GHSA-hcj7-6gxh-24ww
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

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-10T20:41:33Z/ Found at https://github.com/parse-community/parse-server/security/advisories/GHSA-hcj7-6gxh-24ww
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:H/SI:H/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-30948
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

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.0608
EPSS Score 0.00021
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-02T04:51:40.052300+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/parse-server/CVE-2026-30948.yml 38.6.0