Vulnerability · Published Nov 1, 2024 · Assigned by GitHub_M

CVE-2024-51492Zusam vulnerable to stored XSS, allowing token theft via crafted SVG

High 8.8

In plain English

A high-severity cross-site scripting in zusam from zusam. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.5%top 57.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Zusam is a free and open-source way to self-host private forums. Prior to version 0.5.6, specially crafted SVG files uploaded to the service as images allow for unrestricted script execution on (raw) image load. With certain payloads, theft of the target user’s long-lived session token is possible. Note that Zusam, at the time of writing, uses a user’s static API key as a long-lived session token, and these terms can be used interchangeably on the platform. This session token/API key remains valid indefinitely, so long as the user doesn’t expressly request a new one via their Settings page. Version 0.5.6 fixes the cross-site scripting vulnerability.

Affected products (as reported)

Vendor	Product	Versions
zusam	zusam	< 0.5.6

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

References

https://github.com/zusam/zusam/security/advisories/GHSA-96fx-5rqv-jfxh x_refsource_CONFIRM
https://github.com/zusam/zusam/commit/5930fdf86fa4abed01f0b345c8ec3c443656db9a x_refsource_MISC
https://github.com/zusam/zusam/releases/tag/0.5.6 x_refsource_MISC
https://pfeister.dev/CVE-2024-51492 x_refsource_MISC