CVE-2018-16736

MEDIUM

rcfilters 2.1.6 - Cross-Site Scripting via _whatfilter and _messages Parameters

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2018-16736. PoCs published by Fahimeh Rezaei.

AI-analyzed exploit summary This exploit demonstrates a Cross-Site Scripting (XSS) vulnerability in the Roundcube rcfilters plugin v2.1.6. The PoC shows how malicious JavaScript can be injected via the _whatfilter and _messages parameters in a POST request to the settings page.

Description

In the rcfilters plugin 2.1.6 for Roundcube, XSS exists via the _whatfilter and _messages parameters (in the Filters section of the settings).

Exploits (1)

exploitdb WORKING POC
by Fahimeh Rezaei · textwebappslinux
https://www.exploit-db.com/exploits/45437

This exploit demonstrates a Cross-Site Scripting (XSS) vulnerability in the Roundcube rcfilters plugin v2.1.6. The PoC shows how malicious JavaScript can be injected via the _whatfilter and _messages parameters in a POST request to the settings page.

Classification
Working Poc 95%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: Roundcube rcfilters plugin v2.1.6
Auth required
Prerequisites: Access to a valid Roundcube session (roundcube_sessid and roundcube_sessauth cookies) · The rcfilters plugin must be installed and enabled
MITRE ATT&CK
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Third Party Advisory x_refsource_misc
https://github.com/roundcube/roundcubemail/issues/6437
Third Party Advisory x_refsource_misc
https://github.com/eagle00789/RC_Filters/issues/19
Exploit, Third Party Advisory, VDB Entry exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/45437/

Scores

CVSS v3 5.4
EPSS 0.0260
EPSS Percentile 83.4%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Details

CWE
CWE-79
Status published
Products (1)
rcfilters_project/rcfilters 2.1.6
Published Sep 09, 2018
Tracked Since Feb 18, 2026