CVE-2021-25294
CRITICALOpenCATS <= 0.9.5-3 - Remote Code Execution via Unsafe Deserialization in DataGrid Activity Parameter
Title source: llmDescription
OpenCATS through 0.9.5-3 unsafely deserializes index.php?m=activity requests, leading to remote code execution. This occurs because lib/DataGrid.php calls unserialize for the parametersactivity:ActivityDataGrid parameter. The PHP object injection exploit chain can leverage an __destruct magic method in guzzlehttp.
References (3)
Core 3
Core References
Exploit, Third Party Advisory x_refsource_misc
https://snoopysecurity.github.io/web-application-security/2021/01/16/09_opencats_php_object_injection.html
Patch, Third Party Advisory x_refsource_misc
https://github.com/snoopysecurity/snoopysecurity.github.io/blob/master/web-application-security/2021/01/16/09_opencats_php_object_injection.html
Vendor Advisory x_refsource_misc
https://www.opencats.org/news/
Scores
CVSS v3
9.8
EPSS
0.1068
EPSS Percentile
95.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-502
Status
published
Products (1)
opencats/opencats
< 0.9.5-3
Published
Jan 18, 2021
Tracked Since
Feb 18, 2026