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GHSA-vm6r-j788-hjh5
No affected components available
Impact
Back end users with access to the file manager can upload malicious files and execute them on the server.
Patches
Update to Contao 4.13.49, 5.3.15 or 5.4.3.
Workarounds
Configure your web server so it does not execute PHP files and other scripts in the Contao file upload directory.
References
https://contao.org/en/security-advisories/remote-command-execution-through-file-uploads
For more information
If you have any questions or comments about this advisory, open an issue in contao/contao.
Credits
Thanks to Jakob Steeg from usd AG for reporting this vulnerability.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a low impact on the availability of the system.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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