Collabora Online: Read-only session authorization bypass permits live document edits
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 24.04.18, 25.04.11
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Collabora Online, the collaborative online office suite built on LibreOffice technology, is affected. A read-only user, such as one with viewer access, can make changes to a shared document during a live session, which could mislead other viewers or be saved unknowingly by an editor in that session.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
Collabora Online is a collaborative online office suite based on LibreOffice technology. Prior to 24.04.18 and 25.04.11, several document operations delegated to `LibreOfficeKit` in the per-document kit process fail to enforce a session's read-only state. A read-only user, such as a viewer-role WOPI user, can send crafted `WebSocket` messages to execute document-mutating `UNO` commands and dialog operations despite the read-only interface. The changes can mislead co-viewers within the live session, or an authorized editor sharing the session can unknowingly save the modifications. The read-only attacker cannot save the document directly, and changes are discarded when the kit session ends unless an authorized editor saves them. This issue is fixed in versions 24.04.18 and 25.04.11.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- CollaboraOnline online
fixed in 24.04.18; From 25.04.0-0 · fixed in 25.04.11