CVE-2012-6431

NONECVSS 0.0

0.0

Symfony 2.0.x before 2.0.20 does not process URL encoded data consistently within the Routing and Security components, which allows remote attackers to bypass intended URI restrictions via a doubly encoded string.

CVSS v3: —
EG Score: 0.0(none)
EPSS: 44.6%
KEV: Not listed

Published

December 27, 2012

Last Modified

April 29, 2026

References (2)

cve@mitrehttp://symfony.com/blog/security-release-symfony-2-0-20-and-2-1-5-released
af854a3a-2127-422b-91ae-364da2661108http://symfony.com/blog/security-release-symfony-2-0-20-and-2-1-5-released

Affected Packages

(4 across 1 ecosystem)

Packagist(4)

Package	Vulnerable range	Fixed in	Dependents
symfony/http-foundation	2.0.4 ... v2.0.9 (13 versions)	2.0.19	—
symfony/routing	2.0.4 ... v2.0.9 (13 versions)	2.0.19	—
symfony/security	2.0.4 ... v2.0.9 (13 versions)	2.0.19	—
symfony/symfony	2.0.4 ... v2.0.9 (14 versions)	2.0.19	—

Data Freshness Timeline

(refreshed 14× 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.

2026-06-02 20:10 UTCepss_batch
2026-06-02 20:10 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
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2026-05-29 13:41 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-29 01:29 UTCEG score recompute
2026-05-28 13:42 UTCepss_batch
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
2026-05-26 07:16 UTCepss_batch

Frequently asked(4)

What is CVE-2012-6431?

CVE-2012-6431 is a none vulnerability published on December 27, 2012. Symfony 2.0.x before 2.0.20 does not process URL encoded data consistently within the Routing and Security components, which allows remote attackers to bypass intended URI restrictions via a doubly encoded string.

When was CVE-2012-6431 disclosed?

CVE-2012-6431 was first published in the National Vulnerability Database on December 27, 2012, 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-2012-6431 actively exploited?

CVE-2012-6431 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 44.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-2012-6431?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2012-6431, 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-2012-6431

📅 Published

🔄 Last Modified

🔗 References (2)