VDB-232353 · CVE-2023-36675 · EUVD-2023-40618

MediaWiki prior 1.35.11/1.38.7/1.39.4/1.40.1 Block BlockLogFormatter.php BlockLogFormatter cross site scripting

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.7	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in MediaWiki. Affected by this vulnerability is the function BlockLogFormatter of the file BlockLogFormatter.php of the component Block Handler. Performing a manipulation results in cross site scripting. This vulnerability was named CVE-2023-36675. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in MediaWiki (Content Management System). This affects the function BlockLogFormatter of the file BlockLogFormatter.php of the component Block Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

An issue was discovered in MediaWiki before 1.35.11, 1.36.x through 1.38.x before 1.38.7, 1.39.x before 1.39.4, and 1.40.x before 1.40.1. BlockLogFormatter.php in BlockLogFormatter allows XSS in the partial blocks feature.

The weakness was presented 06/26/2023. The advisory is shared at phabricator.wikimedia.org. This vulnerability is uniquely identified as CVE-2023-36675 since 06/26/2023. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

By approaching the search of inurl:BlockLogFormatter.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.35.11, 1.38.7, 1.39.4 or 1.40.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-40618). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Content Management System

Name

MediaWiki

License

open-source

Website

Product: https://www.mediawiki.org/wiki/MediaWiki

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.7

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: MediaWiki 1.35.11/1.38.7/1.39.4/1.40.1

Timelineinfo

06/26/2023 🔍
06/26/2023 +0 days 🔍
06/26/2023 +0 days 🔍
01/15/2026 +934 days 🔍

Sourcesinfo

Product: mediawiki.org

Advisory: phabricator.wikimedia.org
Status: Confirmed

CVE: CVE-2023-36675 (🔍)
GCVE (CVE): GCVE-0-2023-36675
GCVE (VulDB): GCVE-100-232353
EUVD: 🔍

Entryinfo

Created: 06/26/2023 06:47
Updated: 01/15/2026 01:52
Changes: 06/26/2023 06:47 (41), 07/18/2023 14:42 (11), 01/15/2026 01:52 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.