Is CVE-2021-24427 in the CISA KEV catalog?

No. CVE-2021-24427 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-24427?

CVE-2021-24427 has a CVSS v3 base score of 4.8 (MEDIUM).

What is the EPSS score for CVE-2021-24427?

CVE-2021-24427 has an EPSS score of 0.62% (46th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-24427?

Upgrade w3 total cache to 2.1.3 or later.

CVE & CISA-KEV Catalog

CVE-2021-24427

MEDIUM

4.8

CVSS v3

NVD

Description

The W3 Total Cache WordPress plugin before 2.1.3 did not sanitise or escape some of its CDN settings, allowing high privilege users to use JavaScript in them, which will be output in the page, leading to an authenticated Stored Cross-Site Scripting issue

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

w3 total cacheNVD

Affected:< 2.1.3Fixed in:2.1.3CVE-2021-24427derived from NVD

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 RequiredHigh

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

0.62%probability of exploitation in 30 days

46thpercentile

Moderate risk: more likely to be exploited than 46% of all known CVEs.

References

Exploit1

wpscan.com

Other references1

m0ze.ru

Related Vulnerabilities

Other CWE-79 (Cross-Site Scripting (XSS)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-11022	Medium	6.9	99%	-	Fix
CVE-2019-3929	Critical	9.8	99%	KEV	Fix
CVE-2020-9496	Medium	6.1	99%	-	-
CVE-2023-28341	Medium	6.1	99%	-	Fix
CVE-2018-12998	Medium	6.1	98%	-	-
CVE-2025-4123	High	7.6	98%	-	Fix

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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 2024-11-21.