CVE-2009-4421

NONECVSS 0.0Trending — 3 sources updated this weekElevated

0.0

Directory traversal vulnerability in languages_cgi.php in Simple PHP Blog 0.5.1 and earlier allows remote authenticated users to include and execute arbitrary local files via a .. (dot dot) in the blog_language1 parameter.

CVSS v3: —
EG Score: 0.0(none)
EPSS: 83.5%
KEV: Not listed

Published

December 24, 2009

Last Modified

April 23, 2026

References (8)

cve@mitrehttp://archives.neohapsis.com/archives/fulldisclosure/2009-12/0398.html
cve@mitrehttp://www.securityfocus.com/archive/1/508546/100/0/threaded
cve@mitrehttp://www.securityfocus.com/bid/37434
cve@mitrehttps://exchange.xforce.ibmcloud.com/vulnerabilities/54970
af854a3a-2127-422b-91ae-364da2661108http://archives.neohapsis.com/archives/fulldisclosure/2009-12/0398.html
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/archive/1/508546/100/0/threaded
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/37434
af854a3a-2127-422b-91ae-364da2661108https://exchange.xforce.ibmcloud.com/vulnerabilities/54970

Weakness Classification(1)

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

CWE-22Path Traversal

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-04 13:09 UTCepss_batch
2026-06-04 13:09 UTCepss_batch
2026-06-02 20:10 UTCepss_batch
2026-06-02 20:10 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
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2026-05-31 22:28 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:13 UTCepss_batch
2026-05-29 13:40 UTCepss_batch
2026-05-29 13:16 UTCEG score recompute
2026-05-29 13:16 UTCGHSA enrichment
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 13:41 UTCepss_batch
2026-05-26 07:16 UTCepss_batch

Publicly available exploits

(1 reference)

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

Exploit-DBEDB-10604
First seen Dec 22, 2009
Simple PHP Blog 0.5.1 - Local File Inclusion
Open source ↗

Frequently asked(4)

What is CVE-2009-4421?

CVE-2009-4421 is a none vulnerability published on December 24, 2009. Directory traversal vulnerability in languagescgi.php in Simple PHP Blog 0.5.1 and earlier allows remote authenticated users to include and execute arbitrary local files via a .. (dot dot) in the bloglanguage1 parameter.

When was CVE-2009-4421 disclosed?

CVE-2009-4421 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-2009-4421 actively exploited?

CVE-2009-4421 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 83.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2009-4421?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2009-4421, 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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CVE-2009-4421

📅 Published

🔄 Last Modified

🔗 References (8)

Weakness Classification(1)

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(4)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2009-4421?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (8)

Frequently asked(4)

Related CVEs(same CWE)