CVEvulnerability
CVE-2021-36766
7.2 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-07-30
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.2 HIGH — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 6.5 MEDIUM — AV:N/AC:L/Au:S/C:P/I:P/A:P
- Weaknesses
- CWE-502
Description
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.
Affected configurations
• concretecms concrete cms (< 8.5.6)
Related
Weakness · CWE (1)
- CWE-502 Deserialization of Untrusted Data weakness
References
- http://packetstormsecurity.com/files/163564/Concrete5-8.5.5-Phar-Deserialization.html Exploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2021/Jul/36 Exploit, Mailing List, Third Party Advisory
- https://hackerone.com/reports/1063039 Permissions Required, Third Party Advisory
- http://packetstormsecurity.com/files/163564/Concrete5-8.5.5-Phar-Deserialization.html Exploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2021/Jul/36 Exploit, Mailing List, Third Party Advisory
- https://hackerone.com/reports/1063039 Permissions Required, Third Party Advisory