CVE-2023-36674Public exploitNetwork attack vector

Blocked-image display via unchecked Manualthumb path

Published Aug 20, 2023 · Updated Oct 8, 2024

Improper input validation in affected MediaWiki releases allows remote attackers to display images blocked by the configured Bad image list. Parser-generated manual-thumbnail links reached Linker without a badFile lookup, allowing the thumb parameter to reference a prohibited image. Exploitation requires a target entry in the bad-image list and the ability to submit File syntax; the result is unauthorized image display, not file upload or code execution.

CVSS severity5.3
Medium
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in affected MediaWiki releases allows remote attackers to display images blocked by the configured Bad image list. Parser-generated manual-thumbnail links reached Linker without a badFile lookup, allowing the thumb parameter to reference a prohibited image. Exploitation requires a target entry in the bad-image list and the ability to submit File syntax; the result is unauthorized image display, not file upload or code execution.

The record

CVE
CVE-2023-36674
Published
Aug 20, 2023
Updated
Oct 8, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 8, 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

5.3NIST NVDCVSS: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 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-20Improper Input Validation

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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