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.

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/mastodon/mastodon/commit/ff32475f5f4a84ebf9619e7eef5bf8b4c075d0e2	Patch
https://github.com/mastodon/mastodon/security/advisories/GHSA-2693-xr3m-jhqr	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:joinmastodon:mastodon::::::::
	cpe:2.3:a:joinmastodon:mastodon::::::::
	cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta1::::::
	cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta2::::::
	cpe:2.3:a:joinmastodon:mastodon:4.2.0:beta3::::::
	cpe:2.3:a:joinmastodon:mastodon:4.2.0:rc1::::::

History

No history.

Information

Published : 2023-09-19 16:15

Updated : 2023-09-22 17:12

NVD link : CVE-2023-42452

Mitre link : CVE-2023-42452

CVE.ORG link : CVE-2023-42452

JSON object : View

Products Affected

joinmastodon

mastodon

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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