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CVE-2023-1774
Unauthorized email invite to a private channel
Medium4.2EPSS 0.32%
- Published
- Updated
- Reserved
- Assigned by
- Mattermost
Description
When processing an email invite to a private channel on a team, Mattermost fails to validate the inviter's permission to that channel, allowing an attacker to invite themselves to a private channel.
Timeline
ID reserved
By Mattermost
Published
- 21 months later
· 21 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 | Medium4.2 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N |
| NVDNVD · Modified | 3.1 | Medium5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.32% · top 75% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.2.
Weakness
Affected products
- affected ≤ 7.7.1
- unaffected 7.7.2
- unaffected 7.8.0
- unaffected 7.1.6
- affected ≤ 7.1.5
- affected < 7.8.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/mattermost/mattermost-serverGHSA-9hj7-v56g-rhf6 (opens in a new tab)
- Gogithub.com/mattermost/mattermost-server/v5GHSA-9hj7-v56g-rhf6 (opens in a new tab)
- Gogithub.com/mattermost/mattermost-server/v6GHSA-9hj7-v56g-rhf6 (opens in a new tab)
What to do
Solution: Update Mattermost to version v7.8.0, v7.1.6, v7.7.2, 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-9hj7-v56g-rhf6 (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-2023-1774)Record last updated .