CVE-2023-36462 — Mastodon is a free, open-source social network server based on ActivityPub
Mastodon is a free, open-source social network server based on ActivityPub. Starting in version 2.6.0 and prior to versions 3.5.9, 4.0.5, and 4.1.3, an attacker can craft a verified profile link using specific formatting to conceal arbitrary parts of the link, enabling it to appe
Published
2023-07-06T19:16:37.617Z
Last modified
2024-10-24T14:25:32.031Z
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
01What is this vulnerability?
Mastodon is a free, open-source social network server based on ActivityPub. Starting in version 2.6.0 and prior to versions 3.5.9, 4.0.5, and 4.1.3, an attacker can craft a verified profile link using specific formatting to conceal arbitrary parts of the link, enabling it to appear to link to a different URL altogether. The link is visually misleading, but clicking on it will reveal the actual…
02Affected products
| Vendor | Product | Versions |
|---|
| mastodon | mastodon | >= 2.6.0, < 3.5.9, >= 4.0.0, < 4.0.5, >= 4.1.0, < 4.1.3 |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2023-07-06T19:16:37.617Z
- Last modified: 2024-10-24T14:25:32.031Z
09References
- github.com — https://github.com/mastodon/mastodon/security/advisories/GHSA-55j9-c3mp-6fcq
- github.com — https://github.com/mastodon/mastodon/commit/610731b03dfcadd887078cb0399f4e514aa1…
- github.com — https://github.com/mastodon/mastodon/releases/tag/v3.5.9
- github.com — https://github.com/mastodon/mastodon/releases/tag/v4.0.5
- github.com — https://github.com/mastodon/mastodon/releases/tag/v4.1.3
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