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CVE-2023-5969
Denial of Service via Link Preview in /api/v4/redirect_location
Medium5.3EPSS 0.53%
- Published
- Updated
- Reserved
- Assigned by
- Mattermost
Description
Mattermost fails to properly sanitize the request to /api/v4/redirect_location allowing an attacker, sending a specially crafted request to /api/v4/redirect_location, to fill up the memory due to caching large items.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| MattermostCNA (assigner) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
- EPSS (exploitation in 30 days)
- 0.53% · top 55% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
- affected ≤ 7.8.11
- affected ≤ 8.0.3
- affected ≤ 8.1.2
- affected ≤ 9.0.0
- unaffected 7.8.12
- unaffected 8.0.4
- unaffected 8.1.3
- unaffected 9.0.1
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/mattermost/mattermost-server/v6GHSA-w496-f5qq-m58j (opens in a new tab)
- Gogithub.com/mattermost/mattermost/server/v8GHSA-w496-f5qq-m58j (opens in a new tab)
What to do
Solution: Update Mattermost Server to versions 7.8.12, 8.0.4, 8.1.3, 9.0.1 or higher.
References (1)
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)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-w496-f5qq-m58j (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-5969)Record last updated .