CVE-2021-36766
moderate-risk
Published 2021-07-30
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.
Do I need to act?
~
1.5% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.2/10
High
NETWORK
/ LOW complexity
Affected Products (1)
Affected Vendors
References (6)
Permissions Required
https://hackerone.com/reports/1063039
Permissions Required
https://hackerone.com/reports/1063039
35
/ 100
moderate-risk
Severity
26/34 · High
Exploitability
4/34 · Minimal
Exposure
5/34 · Minimal