CVE-2023-25154: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

February 22, 2023 (updated March 3, 2023)

Misskey is an open source, decentralized social media platform. In versions prior to 13.5.0 the link to the instance to the sender that appears when viewing a user or note received through ActivityPub is not properly validated, so by inserting a URL with a javascript scheme an attacker may execute JavaScript code in the context of the recipient. This issue has been fixed in version 13.5.0. Users are advised to upgrade. Users unable to upgrade should not “view on remote” for untrusted instances.

References

github.com/misskey-dev/misskey/security/advisories/GHSA-pfp5-r48x-fg25
nvd.nist.gov/vuln/detail/CVE-2023-25154

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