Vulnerability Description
Mastodon is a free, open-source social network server based on ActivityPub. In versions on the 4.x branch prior to versions 4.0.10, 4.2.8, and 4.2.0-rc2, under certain conditions, attackers can abuse the translation feature to bypass the server-side HTML sanitization, allowing unescaped HTML to execute in the browser. The impact is limited thanks to Mastodon's strict Content Security Policy, blocking inline scripts, etc. However a CSP bypass or loophole could be exploited to execute malicious XSS. Furthermore, it requires user interaction, as this can only occur upon clicking the “Translate” button on a malicious post. Versions 4.0.10, 4.2.8, and 4.2.0-rc2 contain a patch for this issue.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Joinmastodon | Mastodon | >= 4.0.0, < 4.0.10 |
Related Weaknesses (CWE)
References
- https://github.com/mastodon/mastodon/commit/ff32475f5f4a84ebf9619e7eef5bf8b4c075Patch
- https://github.com/mastodon/mastodon/security/advisories/GHSA-2693-xr3m-jhqrVendor Advisory
- https://github.com/mastodon/mastodon/commit/ff32475f5f4a84ebf9619e7eef5bf8b4c075Patch
- https://github.com/mastodon/mastodon/security/advisories/GHSA-2693-xr3m-jhqrVendor Advisory
FAQ
What is CVE-2023-42452?
CVE-2023-42452 is a vulnerability with a CVSS score of 6.1 (MEDIUM). Mastodon is a free, open-source social network server based on ActivityPub. In versions on the 4.x branch prior to versions 4.0.10, 4.2.8, and 4.2.0-rc2, under certain conditions, attackers can abuse ...
How severe is CVE-2023-42452?
CVE-2023-42452 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-42452?
Check the references section above for vendor advisories and patch information. Affected products include: Joinmastodon Mastodon.