CVE-2021-25294

CRITICAL

OpenCATS <0.9.5-3 - Code Injection

Title source: llm

Description

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)

[Patch, Third Party Advisory] https://github.com/snoopysecurity/snoopysecurity.github.io/blob/master/web-application-security/2021/01/16/09_opencats_php_object_injection.html

[Exploit, Third Party Advisory] https://snoopysecurity.github.io/web-application-security/2021/01/16/09_opencats_php_object_injection.html

[Vendor Advisory] https://www.opencats.org/news/

Scores

CVSS v3 9.8

EPSS 0.2773

EPSS Percentile 96.4%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

CWE

CWE-502

Status published

Affected Products (1)

opencats/opencats < 0.9.5-3

Timeline

Published Jan 18, 2021

Tracked Since Feb 18, 2026