Vulnerability · Published Nov 27, 2023 · Assigned by Mattermost
CVE-2023-43754Permalink previews displayed for posts in archived channels even if users are disallowed to view archived channels
Medium 4.3
In plain English
A medium-severity information exposure in Mattermost from Mattermost. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.5%top 56.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/mattermost/mattermost-server/v6 | 7.8.13 | GHSA-jjr7-372r-cx7x |
| Go | github.com/mattermost/mattermost/server/v8 | 9.1.1 | GHSA-jjr7-372r-cx7x |
| Go | github.com/mattermost/mattermost/server/v8 | 9.0.2 | GHSA-jjr7-372r-cx7x |
| Go | github.com/mattermost/mattermost/server/v8 | 8.1.4 | GHSA-jjr7-372r-cx7x |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | 0 – through 7.8.120 – through 8.1.30 – through 9.0.10 – through 9.1.0 |
Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N