CVE-2025-49590

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 v4.0

2.9 LOWCVSS: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:X/V:X/RE:X/U:X

CVSS v3.1

6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

0.29% chance of exploitation in the next 30 days, 21th percentile

Published

2025-06-18

Updated

2025-06-23

Proof-of-concept exploits (1)

• cryptpad/cryptpad/security/advisories/GHSA-vq9h-x3gr-v8rj

References

• CVE Record
• NVD entry

Related

• CVE-2025-49591
• CVE-2025-49579
• CVE-2025-49578
• CVE-2025-49596
• CVE-2025-49577
• CVE-2025-49619