CVE-2023-43754Permalink previews displayed for posts in archived channels even if users are disallowed to view archived channels
- 4.3MediumCVSS base score
- 0.51%Exploitation in 30 daysEPSS · top 56% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Mattermost fails to check whether the “Allow users to view archived channels” setting is enabled during permalink previews display, allowing members to view permalink previews of archived channels even if the “Allow users to view archived channels” setting is disabled.
Timeline
ID reserved
By Mattermost
- 5 days later
· 5 days later
Published
- 8 months later
· 8 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| MattermostCNA (assigner) | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVDNVD · Modified | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.51% · top 56% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Affected products
- affected ≤ 7.8.12
- affected ≤ 8.1.3
- affected ≤ 9.0.1
- affected ≤ 9.1.0
- unaffected 9.0.2
- unaffected 9.1.1
- unaffected 7.8.13
- unaffected 8.1.4
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/mattermost/mattermost-server/v6GHSA-jjr7-372r-cx7x (opens in a new tab)
- Gogithub.com/mattermost/mattermost/server/v8GHSA-jjr7-372r-cx7x (opens in a new tab)
What to do
Solution: Update Mattermost Server to versions 9.0.2, 9.1.1, 7.8.13, 8.1.4 or higher.
References
References1
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2023-2991 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-jjr7-372r-cx7x (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2023-43754)Record last updated .