CVE-2011-4885

NONECVSS 0.09.0▲
EchelonGraph scoreLOW confidence

Score elevated to 9.0 because EPSS predicts 87% probability of exploitation within the next 30 days (top 0.6% of all CVEs). Confidence: see factors.

Triggered by: EPSS exploit prediction ≥85%
Sources: epss
Weaponized
0.0
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 84%
CISA-KEV: Not listedEPSS: 84%CVSS: —Exploit: NoneExposed: 0

A fix is available — apply it.

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.

CVSS v3
—
EG Score
9.0(low)
EPSS
99.7%
KEV
Not listed

Published

December 30, 2011

Last Modified

April 29, 2026

References (54)

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibapache2-mod-php5 (5.3.6-13ubuntu3.5) @ oneiric2026-05-29ubuntu
redhatphp-0:4.3.9-3.352012-01-30redhat
redhatphp-0:5.1.6-27.el5_7.42012-01-18redhat
redhatphp-0:5.3.3-3.el6_2.52012-01-11redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(4)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 3× in last 7d / 18× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 16:23 UTCEPSS rescore
  2. 2026-07-04 06:27 UTCEPSS rescore
  3. 2026-07-01 15:02 UTCEPSS rescore
  4. 2026-06-27 03:05 UTCEPSS rescore
  5. 2026-06-27 03:05 UTCEPSS rescore
  6. 2026-06-24 14:02 UTCEPSS rescore
  7. 2026-06-24 14:02 UTCEPSS rescore
  8. 2026-06-23 21:30 UTCEPSS rescore
  9. 2026-06-21 14:53 UTCEPSS rescore
  10. 2026-06-21 01:56 UTCEPSS rescore
  11. 2026-06-21 01:56 UTCEPSS rescore
  12. 2026-06-16 17:49 UTCEPSS rescore
  13. 2026-06-16 17:49 UTCEPSS rescore
  14. 2026-06-15 17:44 UTCEPSS rescore
  15. 2026-06-13 22:57 UTCEPSS rescore
  16. 2026-06-12 23:08 UTCEPSS rescore
  17. 2026-06-11 13:56 UTCEPSS rescore
  18. 2026-06-10 22:14 UTCEPSS rescore
  19. 2026-06-05 22:44 UTCEPSS rescore
  20. 2026-06-05 22:44 UTCEPSS rescore
  21. 2026-06-04 13:09 UTCEPSS rescore
  22. 2026-06-02 20:10 UTCEPSS rescore
  23. 2026-06-02 20:10 UTCEPSS rescore
  24. 2026-06-01 13:49 UTCEPSS rescore
  25. 2026-05-31 22:28 UTCEPSS rescore
Show 19 more
  1. 2026-05-31 22:28 UTCEPSS rescore
  2. 2026-05-31 00:14 UTCEPSS rescore
  3. 2026-05-31 00:14 UTCEPSS rescore
  4. 2026-05-29 13:41 UTCEPSS rescore
  5. 2026-05-29 05:52 UTCEG score recompute
  6. 2026-05-29 05:52 UTCVendor advisory
  7. 2026-05-29 05:52 UTCGHSA enrichment
  8. 2026-05-28 13:42 UTCEPSS rescore
  9. 2026-05-28 13:42 UTCEPSS rescore
  10. 2026-05-26 13:41 UTCEPSS rescore
  11. 2026-05-26 13:41 UTCEPSS rescore
  12. 2026-05-22 21:15 UTCEPSS rescore
  13. 2026-05-22 21:15 UTCEPSS rescore
  14. 2026-05-22 21:15 UTCEPSS rescore
  15. 2026-05-20 22:37 UTCEPSS rescore
  16. 2026-05-20 22:37 UTCEPSS rescore
  17. 2026-05-20 22:37 UTCEPSS rescore
  18. 2026-05-18 21:29 UTCEPSS rescore
  19. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(4 references)

Working exploit code is in the public domain (1 Metasploit module) (3 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-18305✓ verified
    First seen Jan 3, 2012

    PHP Hash Table Collision - Denial of Service (PoC)

    Open source ↗
  • Exploit-DBEDB-18296
    First seen Jan 1, 2012

    PHP 5.3.8 - Hashtables Denial of Service

    Open source ↗
  • Metasploitauxiliary/dos/http/hashcollision_dos✓ verified
    First seen Dec 28, 2011

    Hashtable Collisions

    Open source ↗
  • Exploit-DBEDB-2012✓ verified
    First seen Jul 15, 2006

    MyBulletinBoard (MyBB) 1.1.5 - 'CLIENT-IP' SQL Injection

    Open source ↗

Frequently asked(4)

What is CVE-2011-4885?
CVE-2011-4885 is a none vulnerability published on December 30, 2011. 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.
When was CVE-2011-4885 disclosed?
CVE-2011-4885 was first published in the National Vulnerability Database on December 30, 2011, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2011-4885 actively exploited?
CVE-2011-4885 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2011-4885?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-4885, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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