CVE-2025-49590

CryptPad Dom-Based Cross-Site Scripting (XSS) Vulnerability

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.

References

Link	Tags
https://github.com/cryptpad/cryptpad/security/advisories/GHSA-vq9h-x3gr-v8rj
https://github.com/cryptpad/cryptpad/commit/d5e4830ba104a4a442cb23aab5378b8565a95607
https://github.com/cryptpad/cryptpad/blob/15c81aa8ccb737a9a1167481f4a699af331364bb/www/bounce/main.js#L64-L95

Frequently Asked Questions

What is the severity of CVE-2025-49590?: CVE-2025-49590 has been scored as a low severity vulnerability.
How to fix CVE-2025-49590?: To fix CVE-2025-49590, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-49590 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-49590 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-49590?: CVE-2025-49590 affects cryptpad cryptpad.

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Description

Category

CWE-692 – Incomplete Denylist to Cross-Site Scripting

References

Frequently Asked Questions