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CVE-2023-3550— Stored XSS leads to privilege escalation in MediaWiki v1.40.0

Quick assessment

Affected
MediaWiki MediaWiki
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MediaWiki是美国维基媒体（MediaWiki）基金会的一套自由免费的基于网络的Wiki引擎。该产品可用于部署内部的知识管理和内容管理系统。 Mediawiki v1.40.0版本存在安全漏洞，该漏洞源于不验证 XML 文件中使用的命名空间。

CVSS 7.3 · High EPSS 1.38% · P72
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I. Basic Information for CVE-2023-3550

Vulnerability Information
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Vulnerability Title
Stored XSS leads to privilege escalation in MediaWiki v1.40.0
Source: CVE Program / CVE List V5
Vulnerability Description
Mediawiki v1.40.0 does not validate namespaces used in XML files. Therefore, if the instance administrator allows XML file uploads, a remote attacker with a low-privileged user account can use this exploit to become an administrator by sending a malicious link to the instance administrator.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
MediaWiki 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MediaWiki是美国维基媒体（MediaWiki）基金会的一套自由免费的基于网络的Wiki引擎。该产品可用于部署内部的知识管理和内容管理系统。 Mediawiki v1.40.0版本存在安全漏洞，该漏洞源于不验证 XML 文件中使用的命名空间。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
MediaWiki MediaWiki 1.40.0 -

II. Public POCs for CVE-2023-3550

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III. Intelligence Information for CVE-2023-3550

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Vendor Advisories for CVE-2023-3550 (1)

Mailing List Discussions for CVE-2023-3550 (2)

Other References for CVE-2023-3550 (2)

IV. Related Vulnerabilities

Same product: MediaWiki
Same vendor: MediaWiki
Same weakness: CWE-79