How severe is CVE-2013-4701?

CVE-2013-4701 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2013-4701 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4701?

CVE-2013-4701 affects Janrain Php-openid. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2013-4701?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2013-4701 published?

CVE-2013-4701 was published on 2013-08-21 and last updated on 2026-06-16.

CVE-2013-4701

CVE-2013-4701 is a high-severity vulnerability in Janrain Php-openid with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Janrain Php-openid
Published: 2013-08-21
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2013-4701?: 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.
How severe is CVE-2013-4701?: CVE-2013-4701 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2013-4701 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4701?: CVE-2013-4701 affects Janrain Php-openid. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2013-4701?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2013-4701 published?: CVE-2013-4701 was published on 2013-08-21 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:janrain:php-openid:*:*:*:*:*:*:*:*

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