CVE-2011-4885

CVE-2011-4885 is a medium-severity vulnerability in Php with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 84% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Description

PHP before 5.3.9 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.

Frequently asked questions

What is CVE-2011-4885?
PHP before 5.3.9 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.
How severe is CVE-2011-4885?
CVE-2011-4885 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-4885 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 84% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4885?
CVE-2011-4885 primarily affects Php. In total, 45 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4885?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-4885 published?
CVE-2011-4885 was published on 2011-12-30 and last updated on 2026-06-16.

References

Affected products (45)

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Threat intelligence

Threat-intel indicators referencing this CVE: