CVE-2019-16529Network attack vector

Sensitive edit-summary disclosure via missing suppression filtering

Published Mar 19, 2020 · Updated Aug 5, 2024

Information disclosure in MediaWiki CheckUser through 1.35.0 allows remote authenticated users to view oversighted edit summaries. The Special:CheckUser results display logic returns stored edit-summary text without applying the oversight suppression state. Access requires the checkuser permission, but suppression rights are not enforced, exposing hidden summary content without enabling edits or service disruption.

CVSS severity5.3
Medium
EPSS probability0.87%
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 CheckUser through 1.35.0 allows remote authenticated users to view oversighted edit summaries. The Special:CheckUser results display logic returns stored edit-summary text without applying the oversight suppression state. Access requires the checkuser permission, but suppression rights are not enforced, exposing hidden summary content without enabling edits or service disruption.

The record

CVE
CVE-2019-16529
Published
Mar 19, 2020
Updated
Aug 5, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 19, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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 privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NVDAV:N/AC:L/Au:N/C:P/I:N/A:N
5.3NVDCVSS:3.1/AV:N/AC:L/PR:N/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

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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