How severe is CVE-2025-56422?

CVE-2025-56422 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-56422 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-56422?

CVE-2025-56422 affects Limesurvey. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-56422?

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

Does CVE-2025-56422 have an EU (EUVD) identifier?

Yes. CVE-2025-56422 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-208504.

When was CVE-2025-56422 published?

CVE-2025-56422 was published on 2026-03-10 and last updated on 2026-07-05.

CVE-2025-56422

CVE-2025-56422 is a critical-severity vulnerability in Limesurvey with a CVSS 3.x base score of 9.8. 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-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-208504
Weakness: CWE-502
Affected product: Limesurvey
Published: 2026-03-10
Last modified: 2026-07-05

Description

A deserialization vulnerability in LimeSurvey before v6.15.0+250623 allows a remote attacker to execute arbitrary code on the server.

Frequently asked questions

What is CVE-2025-56422?: A deserialization vulnerability in LimeSurvey before v6.15.0+250623 allows a remote attacker to execute arbitrary code on the server.
How severe is CVE-2025-56422?: CVE-2025-56422 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-56422 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-56422?: CVE-2025-56422 affects Limesurvey. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-56422?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-56422 have an EU (EUVD) identifier?: Yes. CVE-2025-56422 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-208504.
When was CVE-2025-56422 published?: CVE-2025-56422 was published on 2026-03-10 and last updated on 2026-07-05.

References

https://github.com/hongancalif/security-advisories/blob/main/CVE-2025-56422.md

EU advisories (EUVD)

http://limesurvey.com

Affected products (1)

cpe:2.3:a:limesurvey:limesurvey:*:*:*:*:*:*:*:*

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