Vulnerability Details CVE-2023-42452
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 64.0%
CVSS Severity
CVSS v3 Score 6.1
References
- https://github.com/mastodon/mastodon/commit/ff32475f5f4a84ebf9619e7eef5bf8b4c075d0e2
- https://github.com/mastodon/mastodon/security/advisories/GHSA-2693-xr3m-jhqr
- https://github.com/mastodon/mastodon/commit/ff32475f5f4a84ebf9619e7eef5bf8b4c075d0e2
- https://github.com/mastodon/mastodon/security/advisories/GHSA-2693-xr3m-jhqr
Products affected by CVE-2023-42452
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cpe:2.3:a:joinmastodon:mastodon:4.0.0
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cpe:2.3:a:joinmastodon:mastodon:4.0.1
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cpe:2.3:a:joinmastodon:mastodon:4.0.2
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cpe:2.3:a:joinmastodon:mastodon:4.0.3
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cpe:2.3:a:joinmastodon:mastodon:4.0.4
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cpe:2.3:a:joinmastodon:mastodon:4.0.5
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cpe:2.3:a:joinmastodon:mastodon:4.0.6
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cpe:2.3:a:joinmastodon:mastodon:4.0.7
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cpe:2.3:a:joinmastodon:mastodon:4.0.8
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cpe:2.3:a:joinmastodon:mastodon:4.0.9
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cpe:2.3:a:joinmastodon:mastodon:4.1.0
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cpe:2.3:a:joinmastodon:mastodon:4.1.1
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cpe:2.3:a:joinmastodon:mastodon:4.1.2
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cpe:2.3:a:joinmastodon:mastodon:4.1.3
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cpe:2.3:a:joinmastodon:mastodon:4.1.4
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cpe:2.3:a:joinmastodon:mastodon:4.1.5
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cpe:2.3:a:joinmastodon:mastodon:4.1.6
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cpe:2.3:a:joinmastodon:mastodon:4.1.7
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cpe:2.3:a:joinmastodon:mastodon:4.2.0