CVE-2023-37253Network attack vector

Suppressed-user disclosure via unfiltered public interfaces

Published Sep 14, 2026 · Updated Sep 14, 2026

Information disclosure in MediaWiki Proofread Page through 1.39.3 allows remote attackers to identify a suppressed user via public interfaces. The extension exposes the hidden username through public API output and client configuration variables instead of applying MediaWiki's suppression check. No authentication or user interaction is required; the disclosed identity is limited to a suppressed user's username, with no reported content access or modification.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in MediaWiki Proofread Page through 1.39.3 allows remote attackers to identify a suppressed user via public interfaces. The extension exposes the hidden username through public API output and client configuration variables instead of applying MediaWiki's suppression check. No authentication or user interaction is required; the disclosed identity is limited to a suppressed user's username, with no reported content access or modification.

The record

CVE
CVE-2023-37253
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
MediaWiki
Product
Proofread Page
Classifications
T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.35.11
  2. Affected versionversion=1.36.0 <1.38.7
  3. Affected versionversion=1.39.0 <1.39.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MediaWiki · Proofread Pageversion=0 <1.35.11; version=1.36.0 <1.38.7; version=1.39.0 <1.39.4

Published CVSS scores

No CVSS assessment is available in this record.

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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 exploitUnconfirmed

Weakness, pattern, technique

T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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