Denial of Service Vulnerability in ModSecurity Web Application Firewall Engine
CVE-2025-48866

7.5HIGH

Key Information:

Vendor

Owasp-modsecurity

Status
Modsecurity
Vendor
CVE Published:
2 June 2025

What is CVE-2025-48866?

ModSecurity, a widely-used open-source web application firewall, is susceptible to a denial of service vulnerability due to the sanitiseArg action. This vulnerability enables an attacker to manipulate the number of arguments processed, leading to service interruptions. To mitigate the risk, users are advised to upgrade to version 2.9.10 or later and refrain from utilizing rules involving the sanitiseArg action until the upgrade is applied.

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Affected Version(s)

ModSecurity < 2.9.10

References

https://github.com/owasp-modsecurity/ModSecurity/security...
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https://github.com/owasp-modsecurity/ModSecurity/security...
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https://github.com/owasp-modsecurity/ModSecurity/commit/3...
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CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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