Channel export permitted on archived channel when viewing archived channels is disabled
Mattermost versions 10.1.x <= 10.1.3, 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to restrict channel export of archived channels when the "Allow users to view archived channels" is disabled which allows a user to export channel contents when they shouldn't have access to it
02 / AFFECTED SOFTWARE
Affected packages
53 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
Mattermost versions 10.1.x <= 10.1.3, 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to restrict channel export of archived channels when the "Allow users to view archived channels" is disabled which allows a user to export channel contents when they shouldn't have access to it
Mattermost fails to restrict channel export of archived channels in github.com/mattermost/mattermost-server
Mattermost versions 10.1.x <= 10.1.3, 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to restrict channel export of archived channels when the "Allow users to view archived channels" is disabled which allows a user to export channel contents when they shouldn't have access to it
05 / REFERENCES
Further evidence
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/24xxx/CVE-2025-24526.json
- https://mattermost.com/security-updates
- https://nvd.nist.gov/vuln/detail/CVE-2025-24526
- https://github.com/advisories/GHSA-q8p2-2hwc-jw64
- https://github.com/mattermost/mattermost-plugin-channel-export/commit/3c052b66207fb734bfc4c948941e7f7522a82550
- https://github.com/mattermost/mattermost-plugin-channel-export/issues/51
- https://github.com/mattermost/mattermost/commit/96195f1bd7467f572525c35b5087acaeb53daa63
- https://github.com/mattermost/mattermost