How severe is CVE-2025-51846?

CVE-2025-51846 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-51846 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-51846?

CVE-2025-51846 affects Xwiki Cryptpad. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-51846?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-51846 have an EU (EUVD) identifier?

Yes. CVE-2025-51846 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209596.

When was CVE-2025-51846 published?

CVE-2025-51846 was published on 2026-04-30 and last updated on 2026-06-17.

CVE-2025-51846

CVE-2025-51846 is a high-severity vulnerability in Xwiki Cryptpad with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-209596
Weakness: CWE-770
Affected product: Xwiki Cryptpad
Published: 2026-04-30
Last modified: 2026-06-17

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.

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.
How severe is CVE-2025-51846?: CVE-2025-51846 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-51846 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-51846?: CVE-2025-51846 affects Xwiki Cryptpad. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-51846?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-51846 have an EU (EUVD) identifier?: Yes. CVE-2025-51846 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-209596.
When was CVE-2025-51846 published?: CVE-2025-51846 was published on 2026-04-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:xwiki:cryptpad:*:*:*:*:*:*:*:*

More vulnerabilities in Xwiki Cryptpad

CVE-2025-49591 — Critical (CVSS 9.1): CryptPad is a collaboration suite. Prior to version 2025.3.0, enforcement of Two-Factor Authentication (2FA) in…
CVE-2019-15302 — Medium (CVSS 6.5): The pad management logic in XWiki labs CryptPad before 3.0.0 allows a remote attacker (who has access to a Rich Text…
CVE-2025-49590 — Medium (CVSS 6.1): CryptPad is a collaboration suite. Prior to version 2025.3.0, the "Link Bouncer" functionality attempts to filter…
CVE-2017-1000051 — Medium (CVSS 6.1): Cross-site scripting (XSS) vulnerability in pad export in XWiki labs CryptPad before 1.1.1 allows remote attackers to…

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