CVE-2017-8912

HIGH

CMS Made Simple 2.1.6 - Authenticated PHP Code Execution via Edit User Tag

Title source: manual
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2017-8912. PoCs published by Osanda Malith Jayathissa.

AI-analyzed exploit summary This exploit demonstrates a Remote Code Execution (RCE) vulnerability in CMSMS 2.1.6 via a POST request to the editusertag.php endpoint, allowing arbitrary command execution through the 'code' parameter. It also includes a Stored XSS vulnerability via the addgroup.php endpoint.

Description

CMS Made Simple (CMSMS) 2.1.6 allows remote authenticated administrators to execute arbitrary PHP code via the code parameter to admin/editusertag.php, related to the CreateTagFunction and CallUserTag functions. NOTE: the vendor reportedly has stated this is "a feature, not a bug.

Exploits (1)

exploitdb WORKING POC
by Osanda Malith Jayathissa · textwebappsphp
https://www.exploit-db.com/exploits/41997

This exploit demonstrates a Remote Code Execution (RCE) vulnerability in CMSMS 2.1.6 via a POST request to the editusertag.php endpoint, allowing arbitrary command execution through the 'code' parameter. It also includes a Stored XSS vulnerability via the addgroup.php endpoint.

Classification
Working Poc 95%
Attack Type
Rce | Xss
Complexity
Trivial
Reliability
Reliable
Target: CMSMS 2.1.6
Auth required
Prerequisites: Access to the admin panel · Valid session token (_sk_)
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (2)

Core 2
Core References
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/41997/
Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://osandamalith.com/2017/05/11/cmsms-2-1-6-multiple-vulnerabilities/

Scores

CVSS v3 7.2
EPSS 0.0311
EPSS Percentile 86.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-94
Status published
Products (1)
cmsmadesimple/cms_made_simple 2.1.6
Published May 12, 2017
Tracked Since Feb 18, 2026