Vulnerability · Published Feb 22, 2023 · Assigned by GitHub_M

CVE-2023-25154Cross site scripting (XSS) of ActivityPub URI in misskey

High 7.1

In plain English

A high-severity cross-site scripting in misskey from misskey-dev. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).

Severity (CVSS 3.1)7.1High

Exploit odds (30 days)0.4%top 62.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
misskey-dev	misskey	< 13.5.0

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

References

https://github.com/misskey-dev/misskey/security/advisories/GHSA-pfp5-r48x-fg25 x_refsource_CONFIRM