CVE-2009-4137

NONECVSS 0.0Elevated
0.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No confirmed exploitation signals yet
CISA-KEV: Not listedEPSS: 17%CVSS: —Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

The loadContentFromCookie function in core/Cookie.php in Piwik before 0.5 does not validate strings obtained from cookies before calling the unserialize function, which allows remote attackers to execute arbitrary code or upload arbitrary files via vectors related to the __destruct function in the Piwik_Config class; php://filter URIs; the __destruct functions in Zend Framework, as demonstrated by the Zend_Log destructor; the shutdown functions in Zend Framework, as demonstrated by the Zend_Log_Writer_Mail class; the render function in the Piwik_View class; Smarty templates; and the _eval function in Smarty.

CVSS v3
—
EG Score
0.0(none)
EPSS
96.7%
KEV
Not listed

Published

December 24, 2009

Last Modified

April 23, 2026

References (16)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 3× in last 7d / 35× 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. 2026-07-05 02:26 UTCEPSS rescore
  2. 2026-07-05 02:26 UTCEPSS rescore
  3. 2026-07-01 15:02 UTCEPSS rescore
  4. 2026-06-30 23:19 UTCEPSS rescore
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  22. 2026-06-18 17:49 UTCEPSS rescore
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  1. 2026-06-16 17:49 UTCEPSS rescore
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  6. 2026-06-13 22:57 UTCEPSS rescore
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  13. 2026-06-06 13:44 UTCEPSS rescore
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  16. 2026-06-05 22:44 UTCEPSS rescore
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  18. 2026-06-05 06:07 UTCEPSS rescore
  19. 2026-06-04 13:09 UTCEPSS rescore
  20. 2026-06-04 13:09 UTCEPSS rescore
  21. 2026-06-02 20:10 UTCEPSS rescore
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  23. 2026-05-31 22:28 UTCEPSS rescore
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  25. 2026-05-31 00:13 UTCEPSS rescore
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  27. 2026-05-29 13:40 UTCEPSS rescore
  28. 2026-05-29 13:17 UTCEG score recompute
  29. 2026-05-29 13:17 UTCGHSA enrichment
  30. 2026-05-28 13:42 UTCEPSS rescore
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  37. 2026-05-26 07:16 UTCEPSS rescore
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  39. 2026-05-24 16:43 UTCEPSS rescore
  40. 2026-05-20 22:37 UTCEPSS rescore
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  42. 2026-05-20 11:21 UTCEPSS rescore
  43. 2026-05-20 11:20 UTCEPSS rescore
  44. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCAlexeyan/CVE-2009-4137
    First seen Nov 28, 2017

    Exploit for piwik CVE-2009-4140 RCE

    Open source ↗

Related CVEs(same CWE)

Frequently asked(4)

What is CVE-2009-4137?
CVE-2009-4137 is a none vulnerability published on December 24, 2009. The loadContentFromCookie function in core/Cookie.php in Piwik before 0.5 does not validate strings obtained from cookies before calling the unserialize function, which allows remote attackers to execute arbitrary code or upload arbitrary files via vectors related to the destruct function in the…
When was CVE-2009-4137 disclosed?
CVE-2009-4137 was first published in the National Vulnerability Database on December 24, 2009, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2009-4137 actively exploited?
CVE-2009-4137 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 96.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2009-4137?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-4137, 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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