CVE-2023-51704Public exploitNetwork attack vector

Cross-site scripting via unescaped group-member messages

Published Dec 22, 2023 · Updated Nov 4, 2025

XSS in MediaWiki before 1.35.14, 1.36.0 through 1.39.5, and 1.40.0 through 1.40.1 allows remote attackers to run script in rights-log viewers. RightsLogFormatter inserts group-*-member message text into old and new group lists as raw HTML rather than applying output escaping. Exploitation requires attacker-controlled message content and a rights-log view; successful payloads execute in the viewer's browser and can read or modify page data.

CVSS severity6.1
Medium
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XSS in MediaWiki before 1.35.14, 1.36.0 through 1.39.5, and 1.40.0 through 1.40.1 allows remote attackers to run script in rights-log viewers. RightsLogFormatter inserts group-*-member message text into old and new group lists as raw HTML rather than applying output escaping. Exploitation requires attacker-controlled message content and a rights-log view; successful payloads execute in the viewer's browser and can read or modify page data.

The record

CVE
CVE-2023-51704
Published
Dec 22, 2023
Updated
Nov 4, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 22, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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