CVE-2025-51846

HIGH
Published Apr 30, 2026 Modified May 4, 2026 CWE-770

Description

CryptPad 2025.3.1 allows unbounded WebSocket frame flood. A remote, unauthenticated attacker can significantly degrade or deny service for all users of a CryptPad instance. Fixed in 2026.2.2.

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CVSS v3.1 Score

7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploit Prediction

0.0067
Probability of exploitation
0.72%
Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-770 CWE-770

Affected Products

Vendor Product
xwiki cryptpad

References

Frequently Asked Questions

What is CVE-2025-51846? +
CryptPad 2025.3.1 allows unbounded WebSocket frame flood. A remote, unauthenticated attacker can significantly degrade or deny service for all users of a CryptPad instance. Fixed in 2026.2.2. It has a CVSS v3.1 base score of 7.5 (HIGH).
How severe is CVE-2025-51846? +
CVE-2025-51846 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0067, placing it in the 1th percentile for exploitation probability.
What products are affected by CVE-2025-51846? +
CVE-2025-51846 affects products from xwiki, specifically: cryptpad. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2025-51846? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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