CVE-2023-37301Known exploitationPublic exploitNetwork attack vector

Unauthorized edits via skipped AbuseFilter hook

Published Jun 30, 2023 · Updated Nov 27, 2024

AbuseFilter bypass in Wikibase for MediaWiki 1.39.3 and earlier allows remote attackers to make undo or restore edits that evade filters. SubmitEntityAction::attemptSave sends reconstructed entity content to doUserEditContent without invoking the EditFilterMergedContent hook that AbuseFilter relies on. The target must expose an editable Wikibase entity with relevant filters configured; successful requests can reverse or restore content those filters were intended to block.

CVSS severity5.3
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

AbuseFilter bypass in Wikibase for MediaWiki 1.39.3 and earlier allows remote attackers to make undo or restore edits that evade filters. SubmitEntityAction::attemptSave sends reconstructed entity content to doUserEditContent without invoking the EditFilterMergedContent hook that AbuseFilter relies on. The target must expose an editable Wikibase entity with relevant filters configured; successful requests can reverse or restore content those filters were intended to block.

The record

CVE
CVE-2023-37301
Published
Jun 30, 2023
Updated
Nov 27, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-326, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 27, 2024Record 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

5.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitPublished

Weakness, pattern, technique

CWE-326Inadequate Encryption Strength
T1190Exploit Public-Facing Application

Public exploit references

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

Reported exploitation

Technologies

Your stack

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Your stack

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