How severe is CVE-2019-18987?

CVE-2019-18987 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-2019-18987 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-18987?

CVE-2019-18987 affects Mediawiki Abusefilter. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-18987?

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

When was CVE-2019-18987 published?

CVE-2019-18987 was published on 2019-11-15 and last updated on 2026-06-17.

CVE-2019-18987

CVE-2019-18987 is a medium-severity vulnerability in Mediawiki Abusefilter 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. The underlying weakness is classified as CWE-200.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Mediawiki Abusefilter
Published: 2019-11-15
Last modified: 2026-06-17

Description

An issue was discovered in the AbuseFilter extension through 1.34 for MediaWiki. Once a specific abuse filter has (accidentally or otherwise) been made public, its previous versions can be exposed, thus potentially disclosing private or sensitive information within the filter's definition.

Frequently asked questions

What is CVE-2019-18987?: An issue was discovered in the AbuseFilter extension through 1.34 for MediaWiki. Once a specific abuse filter has (accidentally or otherwise) been made public, its previous versions can be exposed, thus potentially disclosing private or sensitive information within the filter's definition.
How severe is CVE-2019-18987?: CVE-2019-18987 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-2019-18987 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-18987?: CVE-2019-18987 affects Mediawiki Abusefilter. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-18987?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-18987 published?: CVE-2019-18987 was published on 2019-11-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mediawiki:abusefilter:*:*:*:*:*:mediawiki:*:*

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