CVE-2011-5021
CVE-2011-5021 is a high-severity vulnerability in Phpids with a CVSS 2.0 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-94.
Key facts
- Severity: High (CVSS 2.0 base score 7.5)
- EPSS exploit prediction: 1% (71st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-94
- Affected product: Phpids
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2011-5021?
- 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.
- How severe is CVE-2011-5021?
- CVE-2011-5021 has a CVSS 2.0 base score of 7.5, rated high severity.
- Is CVE-2011-5021 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2011-5021?
- CVE-2011-5021 primarily affects Phpids. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2011-5021?
- 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.
- When was CVE-2011-5021 published?
- CVE-2011-5021 was published on 2011-12-29 and last updated on 2026-06-16.
References
Affected products (2)
- cpe:2.3:a:phpids:phpids:*:*:*:*:*:*:*:*
- cpe:2.3:a:phpids:phpids:0.6.4:*:*:*:*:*:*:*
More vulnerabilities in Phpids
- CVE-2011-3781 — Medium (CVSS 5.0): PHPIDS 0.6.5 allows remote attackers to obtain sensitive information via a direct request to a .php file, which reveals…
- CVE-2007-3578 — Medium (CVSS 4.3): PHPIDS before 20070703 does not properly handle (1) arithmetic expressions and (2) unclosed comments, which allows…
- CVE-2007-3577 — Medium (CVSS 4.3): PHPIDS before 20070703 does not properly handle use of the substr method in (1) document.location.search and (2)…
- CVE-2007-3580 — Medium (CVSS 4.3): PHPIDS does not properly handle certain code containing newlines, as demonstrated by a try/catch block within a loop,…
- CVE-2007-3579 — Medium (CVSS 4.3): PHPIDS before 20070703 does not properly handle setting the .text property of a SCRIPT element before its attachment to…
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- CVE-2026-53576 — Critical (CVSS 10.0): Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter…
- CVE-2026-10561 — Critical (CVSS 10.0): IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined…
- CVE-2026-25470 — Critical (CVSS 10.0): Improper Control of Generation of Code ('Code Injection') vulnerability in ACPT ACPT (Pro) - Custom Post Types Plugin…
- CVE-2026-48836 — Critical (CVSS 10.0): Unauthenticated Remote Code Execution (RCE) in Easy Invoice <= 2.1.19 versions.