CVSS 3.1
4.3 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NCVE-2026-22892
Medium (4.3) in mattermost mattermost server. EPSS 0.3% chance of exploitation in the next 30 days. Fixed in github.com/mattermost/mattermost-server 10.11.10, 10.11.10+incompatible, 11.1.3.
Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to validate user permissions when creating Jira issues from Mattermost posts, which allows an authenticated attacker with access to the Jira plugin to read post content and attachments from channels they do not have access to via the /create-issue API endpoint by providing the post ID of an inaccessible post.. Mattermost Advisory ID: MMSA-2025-00550
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 19% of CVEs (scores of 2026-10-31)
- CWE
- CWE-863
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:mattermost_server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-9pj7-jh2r-87g8 | Go | github.com/mattermost/mattermost-server | >=11.2.0 <11.2.2 | 11.2.2 |
| GHSA-9pj7-jh2r-87g8 | Go | github.com/mattermost/mattermost-server | >=11.1.0 <11.1.3 | 11.1.3 |
| GHSA-9pj7-jh2r-87g8 | Go | github.com/mattermost/mattermost-server | >=10.11.0 <10.11.10 | 10.11.10 |
| GO-2026-4496 | Go | github.com/mattermost/mattermost-server | >=10.11.0+incompatible <10.11.10+incompatible >=11.1.0+incompatible <11.1.3+incompatible >=11.2.0+incompatible <11.2.2+incompatible | 10.11.10+incompatible, 11.1.3+incompatible, 11.2.2+incompatible |