CVSS 3.1
4.3 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NCVE-2026-4053
Medium (4.3) in mattermost mattermost server. EPSS 0.2% chance of exploitation in the next 30 days. Fixed in github.com/mattermost/mattermost-server 0.0.0-20260414103857-b21ef302025e, 11.5.2, 11.5.2+incompatible.
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to enforce the PostEditTimeLimit on non-message post fields which allows an authenticated user to modify post file attachments, props, and pin status after the edit window has expired via the post patch and update API endpoints.. Mattermost Advisory ID: MMSA-2026-00631
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 5% of CVEs (scores of 2026-10-31)
- CWE
- CWE-672
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:mattermost_server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-hw87-6jcq-9f8q | Go | github.com/mattermost/mattermost-server | >=11.5.0 <11.5.2 | 11.5.2 |
| GHSA-hw87-6jcq-9f8q | Go | github.com/mattermost/mattermost-server | >=0.0.0-20250731163400-5b955468ea1e <0.0.0-20260414103857-b21ef302025e | 0.0.0-20260414103857-b21ef302025e |
| GO-2026-5442 | Go | github.com/mattermost/mattermost-server | >=0.0.0-20250731163400-5b955468ea1e <0.0.0-20260414103857-b21ef302025e >=11.5.0+incompatible <11.5.2+incompatible | 0.0.0-20260414103857-b21ef302025e, 11.5.2+incompatible |