CVE-2025-56422

Modified Modified - Updated After Analysis

Deserialization Vulnerability in LimeSurvey Enables Remote Code Execution

Publication date: 2026-03-10

Last updated on: 2026-07-05

Assigner: MITRE

Description

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

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-03-10

Last Modified

2026-07-05

Generated

2026-07-06

AI Q&A

2026-03-10

EPSS Evaluated

2026-07-05

NVD

CVE-2025-56422

EUVD

EUVD-2025-208504

Affected Vendors & Products

Vendor	Product	Version / Range
limesurvey	limesurvey	to 6.14.3 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-502	The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Attack-Flow Graph

Executive Summary

CVE-2025-56422 is a remote code execution vulnerability in LimeSurvey caused by unsafe deserialization of user-controlled input.

Specifically, LimeSurvey versions prior to 6.15.0+250623 improperly handle the deserialization process, allowing an attacker to supply a specially crafted serialized object.

This malicious input can trigger arbitrary code execution within the application context on the server.

The vulnerability is exploitable remotely.

Impact Analysis

This vulnerability allows a remote attacker to execute arbitrary code on the server running LimeSurvey.

Successful exploitation could lead to full compromise of the server, including unauthorized access, data theft, data manipulation, or disruption of services.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate the CVE-2025-56422 vulnerability, you should upgrade LimeSurvey to version 6.15.0+250623 or later.

This update addresses the unsafe deserialization issue that allows remote code execution by properly handling user-controlled input.

Further details and updates can be found on the official LimeSurvey website and the LimeSurvey GitHub repository issue #4329.

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