How severe is CVE-2019-16529?

CVE-2019-16529 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2019-16529 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-16529?

CVE-2019-16529 affects Mediawiki Checkuser. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-16529?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-16529 published?

CVE-2019-16529 was published on 2020-03-19 and last updated on 2026-06-17.

CVE-2019-16529

CVE-2019-16529 is a medium-severity vulnerability in Mediawiki Checkuser with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Mediawiki Checkuser
Published: 2020-03-19
Last modified: 2026-06-17

Description

An issue was discovered in the CheckUser extension through 1.35.0 for MediaWiki. Oversighted edit summaries are still visible in CheckUser results in violation of MediaWiki's permissions model.

Frequently asked questions

What is CVE-2019-16529?: An issue was discovered in the CheckUser extension through 1.35.0 for MediaWiki. Oversighted edit summaries are still visible in CheckUser results in violation of MediaWiki's permissions model.
How severe is CVE-2019-16529?: CVE-2019-16529 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2019-16529 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-16529?: CVE-2019-16529 affects Mediawiki Checkuser. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-16529?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-16529 published?: CVE-2019-16529 was published on 2020-03-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mediawiki:checkuser:*:*:*:*:*:mediawiki:*:*

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