CVE-2021-31546

MEDIUMNVD 4.34.3—

4.3

An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. It incorrectly logged sensitive suppression deletions, which should not have been visible to users with access to view AbuseFilter log data.

CVSS v3: 4.3
EG Score: 4.3(medium)
EPSS: 29.3%
KEV: Not listed

Published

April 22, 2021

Last Modified

November 21, 2024

References (4)

cve@mitrehttps://gerrit.wikimedia.org/r/q/I38a0a24fa32ca7a052b6940864a32b3856e84553
cve@mitrehttps://phabricator.wikimedia.org/T71617
af854a3a-2127-422b-91ae-364da2661108https://gerrit.wikimedia.org/r/q/I38a0a24fa32ca7a052b6940864a32b3856e84553
af854a3a-2127-422b-91ae-364da2661108https://phabricator.wikimedia.org/T71617

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 18× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
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2026-06-01 13:50 UTCepss_batch
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2026-05-31 22:29 UTCepss_batch
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2026-05-27 13:39 UTCepss_batch
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2026-05-26 18:00 UTCEG score recompute
2026-05-26 18:00 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2021-31546?

CVE-2021-31546 is a medium vulnerability published on April 22, 2021. An issue was discovered in the AbuseFilter extension for MediaWiki through 1.35.2. It incorrectly logged sensitive suppression deletions, which should not have been visible to users with access to view AbuseFilter log data.

When was CVE-2021-31546 disclosed?

CVE-2021-31546 was first published in the National Vulnerability Database on April 22, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-31546 actively exploited?

CVE-2021-31546 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 29.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-31546?

CVE-2021-31546 has a CVSS v3 base score of 4.3 (NVD).

How do I remediate CVE-2021-31546?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-31546, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-31546

📅 Published

🔄 Last Modified

🔗 References (4)

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-31546?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)