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Vulnerability record · CVE-2025-49590 · published 18 June 2025

CVE-2025-49590: Xwiki cryptpad vulnerability

Xwiki · Cryptpad

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.

2.9 CVSS 4.0 Low EPSS 0.33% · top 76.6% CWE-692 · CWE-692
2.9CVSS 4.0 base score
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 1 tagged exploit
17 Jun 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/cryptpad/cryptpad/blob/15c81aa8ccb737a9a1167481f4a699af331364bb/www/bounce/main.js#L64-L95 Product
https://github.com/cryptpad/cryptpad/commit/d5e4830ba104a4a442cb23aab5378b8565a95607 Patch
https://github.com/cryptpad/cryptpad/security/advisories/GHSA-vq9h-x3gr-v8rj ExploitVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.7CVE-2025-51846Xwiki cryptpad allocation without limits vulnerabilityCryptPad 2025.3.1 allows unbounded WebSocket frame flood. A remote, unauthenticated attacker can significantly degrade or deny service for all users …EPSS 0.58%7.4CVE-2025-49591Xwiki cryptpad improper access control vulnerabilityCryptPad is a collaboration suite. Prior to version 2025.3.0, enforcement of Two-Factor Authentication (2FA) in CryptPad can be trivially bypassed, d…EPSS 0.52%6.5CVE-2019-15302Xwiki cryptpad improper resource shutdown vulnerabilityThe pad management logic in XWiki labs CryptPad before 3.0.0 allows a remote attacker (who has access to a Rich Text pad with editing rights for the …EPSS 1.4%6.1CVE-2017-1000051Xwiki cryptpad cross-site scripting vulnerabilityCross-site scripting (XSS) vulnerability in pad export in XWiki labs CryptPad before 1.1.1 allows remote attackers to inject arbitrary web script or …EPSS 1.2%

Source: NIST National Vulnerability Database (record CVE-2025-49590), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.