How severe is CVE-2012-6531?

No CVSS score has been assigned to CVE-2012-6531 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2012-6531?

CVE-2012-6531 affects the following packages: zendframework/zendframework1 (Packagist), zendframework/zendframework1 (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2012-6531?

Update zendframework/zendframework1 to 1.11.13 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2012-6531 is resolved across your whole dependency graph.

How do I detect CVE-2012-6531 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for zendframework/zendframework1, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2012-6531 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2012-6531 actively exploited in the wild?

No public exploit code has been indexed for CVE-2012-6531 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2012-6531?

CVE-2012-6531 has an EPSS (Exploit Prediction Scoring System) score of 2.5%, placing it in the 85th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2012-6531?

CVE-2012-6531 is classified as Improper Input Validation (CWE-20). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2012-6531 published, and has it been updated?

CVE-2012-6531 was published on May 17, 2022 and was last updated on January 12, 2024. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘 Packagist

Not in CISA KEV

CVE-2012-6531 — zendframework1

Fix: zendframework/zf1@1b5e861

CVE-2012-6531 is a Improper Input Validation vulnerability in zendframework/zendframework1. A fix is available for zendframework/zendframework1 — see the affected versions and patch details below.

Zend Framework XEE Vulnerability

Published

May 17, 2022

Updated

Jan 12, 2024

Affected

2 pkgs

Patched

2 / 2

Exploits

None indexed

Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

2.5%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs85th percentile — riskier than 85% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

2 pkgs affected

🐘zendframework/zendframework1🐘zendframework/zendframework1

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

(1) Zend_Dom, (2) Zend_Feed, and (3) Zend_Soap in Zend Framework 1.x before 1.11.13 and 1.12.x before 1.12.0 do not properly handle SimpleXMLElement classes, which allow remote attackers to read arbitrary files or create TCP connections via an external entity reference in a DOCTYPE element in an XML-RPC request, aka an XML external entity (XXE) injection attack, a different vulnerability than CVE-2012-3363.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`zendframework/zendframework1`	≥ 1.0&&< 1.11.13	1.11.13`composer require zendframework/zendframework1:^1.11.13`
🐘Packagist	`zendframework/zendframework1`	≥ 1.12.0-rc1&&< 1.12.0	1.12.0`composer require zendframework/zendframework1:^1.12.0`

Affected Products

1 product · 59 configurations

Application

zend frameworkzend

56 versions

1.0.41.5.01.5.11.5.21.5.31.6.01.6.11.6.21.7.01.7.11.7.21.7.3

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for zendframework/zendframework1, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update zendframework/zendframework1 to 1.11.13 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2012-6531 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

(1) `Zend_Dom`, (2) `Zend_Feed`, and (3) `Zend_Soap` in Zend Framework 1.x before 1.11.13 and 1.12.x before 1.12.0 do not properly handle SimpleXMLElement classes, which allow remote attackers to read arbitrary files or create TCP connections via an external entity reference in a DOCTYPE element in an XML-RPC request, aka an XML external entity (XXE) injection attack, a different vulnerability than CVE-2012-3363.

O3 Security · Impact-Aware SCA

Is CVE-2012-6531 in your dependencies?

Find it across Packagist, including transitive dependencies.

Scan my dependencies How O3 SCA works