PoC Index

CVE-2021-36766

HIGH 7.2EPSS 3.7%

Concrete5 through 8.5.5 deserializes Untrusted Data. The vulnerable code is located within the controllers/single_page/dashboard/system/environment/logging.php Logging::update_logging() method. User input passed through the logFile request parameter is not properly sanitized before being used in a call to the file_exists() PHP function. This can be exploited by malicious users to inject arbitrary PHP objects into the application scope (PHP Object Injection via phar:// stream wrapper), allowing them to carry out a variety of attacks, such as executing arbitrary PHP code.

CVSS v3.1
7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0
6.5 MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:P
EPSS
3.68% chance of exploitation in the next 30 days, 89th percentile
Published
2021-07-27
Updated
2024-08-04

Proof-of-concept exploits (1)

References

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