CVE-2024-51492 Zusam vulnerable to stored XSS, allowing token theft via crafted SVG
Attackers can steal long-lived session tokens via stored XSS in uploaded SVG files, leading to account takeover in Zusam forums.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2024-51492?
CVE-2024-51492 is a high-severity cross-site scripting vulnerability in zusam, published on 1 Nov 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
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.
Weakness: CWE-79
Which versions are affected by CVE-2024-51492?
How do I fix CVE-2024-51492?
No fix has been published for CVE-2024-51492 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2024-51492 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-51492 exists.
Sources
Also known as GHSA-96fx-5rqv-jfxh.