Etherpad Lite Access Restriction Bypass

Description

node/hooks/express/apicalls.js in Etherpad Lite before v1.6.3 mishandles JSONP, which allows remote attackers to bypass intended access restrictions.

Recommendation

Update the ep_etherpad-lite package to the latest compatible version. Followings are version details:

• Affected version(s): < 1.6.3
• Patched version(s): 1.6.3

References

• GHSA-mvmv-rq2j-97p2
• CVE-2018-6835
• CWE-20
• CAPEC-310
• OWASP 2021-A3
• OWASP 2021-A6

Related Issues

• ep_etherpad-lite: Cache-poisoning Cross-site Scripting and Open Redirect via x-proxy-path Header - CVE-2026-55087
• ep_etherpad-lite: Device-to-device author-token transfer endpoint is replayable, never expires, and exposes the cleartex - CVE-2026-55088
• ep_etherpad-lite: Import/export uses Math.random() for temp file paths; predictable paths on shared /tmp enable symlink- - CVE-2026-55086
• File restriction bypass in socket.io-file - CVE-2020-24807

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Tags:

npm

ep_etherpad-lite