CVE-2023-45362Public exploitNetwork attack vector

Suppressed-username disclosure via visibility-blind revision counting

Published Nov 3, 2023 · Updated Nov 4, 2025

Information disclosure in MediaWiki before 1.35.12, 1.36.0 through 1.39.4, and 1.40.0 discloses suppressed usernames to remote authenticated users. DifferenceEngine counts intermediate revisions without filtering users hidden from the viewer, then emits the same-user summary from that unfiltered count. Access to revision comparisons is required; the notice reveals that suppressed intermediate edits share an author but does not expose revision content.

CVSS severity4.3
Medium
EPSS probability0.63%
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 before 1.35.12, 1.36.0 through 1.39.4, and 1.40.0 discloses suppressed usernames to remote authenticated users. DifferenceEngine counts intermediate revisions without filtering users hidden from the viewer, then emits the same-user summary from that unfiltered count. Access to revision comparisons is required; the notice reveals that suppressed intermediate edits share an author but does not expose revision content.

The record

CVE
CVE-2023-45362
Published
Nov 3, 2023
Updated
Nov 4, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 3, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1213Data from Information Repositories

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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