Description
The output_add_rewrite_var function in PHP before 5.2.5 rewrites local forms in which the ACTION attribute references a non-local URL, which allows remote attackers to obtain potentially sensitive information by reading the requests for this URL, as demonstrated by a rewritten form containing a local session ID.
Remediation
References
Related Vulnerabilities
Moodle Resource Management Errors Vulnerability (CVE-2015-2268)
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Moodle Permissions, Privileges, and Access Controls Vulnerability (CVE-2011-4589)
Chamilo Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2021-32925)