Authenticated code execution via source-editor filter bypass
Published Feb 24, 2023 · Updated Mar 12, 2025
Code execution in Peacexie Imcat 5.4 allows remote authenticated users to execute arbitrary PHP through the built-in source editor. safscan.php applies an incomplete dangerous-function filter that can be bypassed by concatenating strings to construct assert, after which the editor saves executable PHP. Access to the CMS background and source-editing function is required; successful exploitation runs code with the web server account and can create a web shell.
Summary
What happened
Code execution in Peacexie Imcat 5.4 allows remote authenticated users to execute arbitrary PHP through the built-in source editor. safscan.php applies an incomplete dangerous-function filter that can be bypassed by concatenating strings to construct assert, after which the editor saves executable PHP. Access to the CMS background and source-editing function is required; successful exploitation runs code with the web server account and can create a web shell.
The record
- CVE
- CVE-2021-35370
- Published
- Feb 24, 2023
- Updated
- Mar 12, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-20, T1505.003
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 24, 2023CVE publishedPublication date reported by the CVE source.
- Mar 12, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- Imcat 5.4 source-editor filter-bypass proof of conceptfunctional · demonstrated
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Technologies
Your stack
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Your stack
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