How severe is CVE-2013-4701?

No CVSS score has been assigned to CVE-2013-4701 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2013-4701?

CVE-2013-4701 affects the following packages: openid/php-openid (Packagist), typo3/cms (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2013-4701?

Update openid/php-openid to 2.3.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2013-4701 is resolved across your whole dependency graph.

How do I detect CVE-2013-4701 in my Packagist dependencies?

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

How do I mitigate CVE-2013-4701 if there is no patch (or I can't update yet)?

Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Is CVE-2013-4701 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2013-4701, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2013-4701?

CVE-2013-4701 has an EPSS (Exploit Prediction Scoring System) score of 3.0%, placing it in the 87th 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.

When was CVE-2013-4701 published, and has it been updated?

CVE-2013-4701 was published on May 17, 2022 and was last updated on December 2, 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-2013-4701 — php-openid

Fix: openid/php-openid@625c16b

CVE-2013-4701 is a security vulnerability in openid/php-openid. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for openid/php-openid — see the affected versions and patch details below.

PHP OpenID Library Denial of Service vulnerability

Published

May 17, 2022

Updated

Dec 2, 2024

Affected

2 pkgs

Patched

2 / 2

Exploits

1 known

Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

3.0%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs87th percentile — riskier than 87% of all scored CVEsHighest risk

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

Real-World Exposure

2 pkgs affected

🐘openid/php-openid🐘typo3/cms

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

Auth/Yadis/XML.php in PHP OpenID Library 2.2.2 and earlier allows remote attackers to read arbitrary files, send HTTP requests to intranet servers, or cause a denial of service (CPU and memory consumption) via XRDS data containing an external entity declaration in conjunction with an entity reference, related to an XML External Entity (XXE) issue.

Affected Packages

2 total 2 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`openid/php-openid`	all versions	2.3.0`composer require openid/php-openid:^2.3.0`
🐘Packagist	`typo3/cms`	≥ 6.2.0&&< 6.2.6	6.2.6`composer require typo3/cms:^6.2.6`

Affected Products

1 product · 1 configurations

Application

php-openidjanrain

≤ 2.2.2

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Auth/Yadis/XML.php in PHP OpenID Library 2.2.2 and earlier allows remote…

github.comNVDNov 2016

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for openid/php-openid, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update openid/php-openid to 2.3.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2013-4701 is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2013-4701 in your dependencies?

Find it across Packagist, including transitive dependencies.

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