CVE-2025-49590 CryptPad Dom-Based Cross-Site Scripting (XSS) Vulnerability
Attackers can execute arbitrary scripts via a bypass in the Link Bouncer filter, potentially compromising user accounts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-49590?
CVE-2025-49590 is a low-severity cross-site scripting vulnerability in cryptpad, published on 18 Jun 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
CryptPad is a collaboration suite. Prior to version 2025.3.0, the "Link Bouncer" functionality attempts to filter javascript URIs to prevent Cross-Site Scripting (XSS), however this can be bypassed. There is an "early allow" code path that happens before the URI's protocol/scheme is checked, which a maliciously crafted URI can follow. This issue has been patched in version 2025.3.0.
Weakness: CWE-692
Which versions are affected by CVE-2025-49590?
It affects 1 product.
Products include Xwiki Cryptpad.
How do I fix CVE-2025-49590?
No fix has been published for CVE-2025-49590 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-2025-49590 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-49590 exists.
Other vulnerabilities in cryptpad
Sources
Also known as GHSA-vq9h-x3gr-v8rj.