CVE-2023-24811: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

February 22, 2023 (updated November 7, 2023)

Misskey is an open source, decentralized social media platform. In versions prior to 13.3.2 the URL preview function is subject to a cross site scripting vulnerability due to insufficient URL validation. Arbitrary JavaScript is executed when a malicious URL is loaded in the View in Player or View in Window preview. This has been fixed in version 13.3.2. Users are advised to upgrade. Users unable to upgrade should avoid usage of the View in Player or View in Window functions.

References

github.com/misskey-dev/misskey/commit/38f9d1e76428bea47c5944c440eab25428c7d99e
github.com/misskey-dev/misskey/security/advisories/GHSA-vc39-c453-67g3
nvd.nist.gov/vuln/detail/CVE-2023-24811

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