GHSA-xvcx-mgpc-5xh3
Suggest an improvement- Source
- https://github.com/advisories/GHSA-xvcx-mgpc-5xh3
- Import Source
- https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-xvcx-mgpc-5xh3/GHSA-xvcx-mgpc-5xh3.json
- JSON Data
- https://api.osv.dev/v1/vulns/GHSA-xvcx-mgpc-5xh3
- Aliases
- Published
- 2026-05-18T09:31:48Z
- Modified
- 2026-06-25T23:11:08Z
- Severity
-
- 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
- Summary
- Mattermost doesn't validate the X-Requested-With header on the burn-on-read reveal endpoint
- Details
-
Mattermost versions 11.5.x <= 11.5.1, 11.4.x <= 11.4.3 fail to validate the X-Requested-With header on the burn-on-read reveal endpoint which allows an authenticated channel member to force the reveal of a burn-on-read message without recipient consent via a crafted Markdown image tag.. Mattermost Advisory ID: MMSA-2026-00636
- Database specific
{ "cwe_ids": [ "CWE-346" ], "github_reviewed": true, "github_reviewed_at": "2026-06-01T15:22:30Z", "nvd_published_at": "2026-05-18T09:16:23Z", "severity": "MODERATE" }- References
Affected packages
Go
github.com/mattermost/mattermost/server/v8
Package
- Name
- github.com/mattermost/mattermost/server/v8
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/mattermost/mattermost/server/v8
github.com/mattermost/mattermost/server/v8
Package
- Name
- github.com/mattermost/mattermost/server/v8
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/mattermost/mattermost/server/v8
github.com/mattermost/mattermost/server/v8
Package
- Name
- github.com/mattermost/mattermost/server/v8
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/mattermost/mattermost/server/v8
github.com/mattermost/mattermost-server
Package
- Name
- github.com/mattermost/mattermost-server
- View open source insights on deps.dev
- Purl
- pkg:golang/github.com/mattermost/mattermost-server