PHP OpenID Library Denial of Service vulnerability
Date: 2022-05
Affected: composer/typo3/cms, composer/openid/php-openid
Attack vector: dos
Category: vulnerability-disclosure
Severity: High
CVE: CVE-2013-4701
CWE: CWE-400

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.


Mitigations:

Architectural layers (MAESTRO):