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CVE-2011-5021

7.5 · HIGH

PHPIDS before 0.7 does not properly implement Regular Expression Denial of Service (ReDoS) filters, which allows remote attackers to bypass rulesets and add PHP sequences to a file via unspecified…

Published Dec 29, 2011phpidsCWE-94EPSS 1.35%

Overview

CVE-2011-5021 is a high-severity vulnerability affecting phpids phpids. It was published on December 29, 2011 and has a CVSS 2.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

PHPIDS before 0.7 does not properly implement Regular Expression Denial of Service (ReDoS) filters, which allows remote attackers to bypass rulesets and add PHP sequences to a file via unspecified vectors.

Remediation

Check the references section for vendor advisories and patches from phpids. Update phpids to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
phpidsphpids0Affected

References

Refsitewat.ch/Advisory/View/7Refsitewat.ch/Advisory/View/7

How CyberStrike helps

Frequently asked questions

What is CVE-2011-5021?

CVE-2011-5021 is a high-severity vulnerability affecting phpids phpids. It was published on December 29, 2011 and has a CVSS 2.0 base score of 7.5 (HIGH).

How severe is CVE-2011-5021?

This vulnerability has a CVSS 2.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2011-5021?

Check the references section for vendor advisories and patches from phpids. Update phpids to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2011-5021?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-5021 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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