CyberRota Analysis
AI-GeneratedIn versions 5.7.0 through 5.7.6 of Contao, an authenticated backend user can exploit a cross-job authorization bypass vulnerability to access job attachments from other job directories by manipulating attachment identifiers. This flaw allows unauthorized access to sensitive files, such as debug logs, within the system's file structure. Organizations using affected versions of Contao should prioritize remediation to protect against potential data exposure.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Contao is an Open Source CMS. In versions 5.7.0 through 5.7.6, an authenticated backend user who can access one job can request an attachment identifier containing ../ segments and make the job attachment download endpoint read a file from another job directory inside var/job-attachments. The controller authorizes only the jobUuid route parameter. The later attachment lookup joins that authorized job UUID with the attacker-controlled identifier, then passes the combined path to the virtual filesystem. VirtualFilesystem::resolve() canonicalizes the whole path and only rejects paths that escape the filesystem mount, so authorized-job/../victim-job/debug_log.csv becomes victim-job/debug_log.csv. This is a cross-job authorization bypass for known job attachment paths. It is not a practical brute-force against unknown jobs because job directories are UUID v4 values.