Is CVE-2021-30153 in the CISA KEV catalog?

No. CVE-2021-30153 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-30153?

CVE-2021-30153 has a CVSS v3 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2021-30153?

CVE-2021-30153 has an EPSS score of 0.83% (53th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-30153?

Upgrade mediawiki on debian 11 to 1:1.35.2-1 or later.

CVE & CISA-KEV Catalog

CVE-2021-30153

MEDIUM

4.3

CVSS v3

NVD

Description

An issue was discovered in the VisualEditor extension in MediaWiki before 1.31.13, and 1.32.x through 1.35.x before 1.35.2. . When using VisualEditor to edit a MediaWiki user page belonging to an existing, but hidden, user, VisualEditor will disclose that the user exists. (It shouldn't because they are hidden.) This is related to ApiVisualEditor.

CWE-668

How to fix

Remediation Available

mediawikiDebian

Fixed in:1:1.35.2-1CVE-2021-30153

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Exploit Intelligence

0.83%probability of exploitation in 30 days

53rdpercentile

Moderate risk: more likely to be exploited than 53% of all known CVEs.

References

Patch1

lists.wikimedia.org

Exploit1

phabricator.wikimedia.org

Other references1

lists.wikimedia.org

Related Vulnerabilities

Other CWE-668 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-39952	Critical	9.8	100%	-	Fix
CVE-2017-16597	Critical	9.8	57%	-	-
CVE-2017-16603	High	8.8	54%	-	-
CVE-2024-25153	Critical	9.8	42%	-	Fix
CVE-2017-0215	Medium	5.3	36%	-	-
CVE-2022-25236	Critical	9.8	34%	-	Fix

Embed a live status badge for CVE-2021-30153

Markdown

[![CVE-2021-30153](https://tridentstack.com/cve/badge/CVE-2021-30153.svg)](https://tridentstack.com/cve/CVE-2021-30153)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-30153"><img src="https://tridentstack.com/cve/badge/CVE-2021-30153.svg" alt="CVE-2021-30153"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-02-06.