Etherpad addressed weak token RNG, login timing, plugin path handling, API request handling
Key facts
- Attack vector
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- Privileges required
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- User interaction
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- Attack complexity
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- Impact type
- Information disclosure
- Confidentiality · integrity · availability
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- Fix status
- Fixed
No CVSS vector from any source. Fix status from GitHub. Impact type from CWE-208.
Summary
Fix: PR #7906 (ether/etherpad). A set of medium/low hardening fixes: - **Weak RNG for tokens (CWE-330):** author/session/readonly IDs were generated with `Math.random()` (client and server). Now use `crypto.getRandomValues`. - **Login timing / no failure delay (CWE-208/CWE-307):** the OIDC interaction login used a non-constant-time password compare with no failure delay. Now uses `crypto.timingSafeEqual` plus a uniform failure delay; user lookup is own-property only. - **Plugin dependency path handling (CWE-22):** plugin dependency names from package.json were used to build filesystem paths without validation (admin-gated install). Now validated against the npm name grammar. - **API parameter pollution (CWE-235):** `/api/2` merged all request headers into the API field set. Now forwards only `authorization`, matching the openapi.ts handler. - **Pad-creation side effect:** `API.appendChatMessage` could create arbitrary pads (missing `getPadSafe`). Now requires the pad to exist. - **Error info disclosure (CWE-209):** the admin file server echoed filesystem error detail; now returns a generic message.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | ep_etherpad-lite (npm) | before 3.3.0 | 3.3.0 | Patch available | GHSA-92hr-gmr6-h8cp |
- ep_etherpad-lite (npm) Vendor— Affected before 3.3.0 Fixed in 3.3.0 Patch available GHSA-92hr-gmr6-h8cp
Remediation
- Fix · GHSA-92hr-gmr6-h8cp ep_etherpad-lite (npm) Fixed in 3.3.0 Advisory →
Timeline
- 2026-10-03 Threatist record created from GHSA-92hr-gmr6-h8cp
References
Sources
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