Unrestricted file upload in Agora
Priority LOW 28CWE-434Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-434.
Summary
In Agora Foundation Agora fall23-Alpha1 before 690ce56, there is XSS via a profile picture to server/controller/userController.js. Formats other than PNG, JPEG, and WEBP are permitted by server/routes/userRoutes.js; this includes SVG.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00273 19th percentileScored 2026-11-07
Fix Fixed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
No affected products listed by the sources yet.
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-55135
- 2026-10-03 Alias added: GHSA-jcj4-g9w3-h34q
References
Other 4
- https://github.com/agorafoundation/agora/pull/556
- https://github.com/agorafoundation/agora/commit/690ce56f254af01375b6033e53a80f14d7cc002e
- https://github.com/agorafoundation/agora/blob/90f7f9c217cf1d5dc9d27f5695cd65b61a4c4759/server/controller/userController.js#L332-L336
- https://github.com/Msfv3n0m/vulnerability-research/tree/main/CVE-2025-55135
More Agora Foundation vulnerabilities
- TI-2025-34818 In Agora Foundation Agora fall23-Alpha1 before b087490, there is XSS via tag in client/agora/public/js/editorManager.js. CVSS 3.1MEDIUM 6.4
- TI-2025-34817 Cross-site scripting in Agora CVSS 3.1MEDIUM 6.4
Sources
- CVE-2025-55135 · CVE Program
- CVE-2025-55135 · NVD
- FIRST EPSS
- GHSA-jcj4-g9w3-h34q · GitHub Advisory Database · CC BY 4.0
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