Is CVE-2021-24245 in the CISA KEV catalog?

No. CVE-2021-24245 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-24245?

CVE-2021-24245 has a CVSS v3 base score of 6.1 (MEDIUM).

What is the EPSS score for CVE-2021-24245?

CVE-2021-24245 has an EPSS score of 5.72% (92th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-24245?

Upgrade stop spammers to 2021.9 or later.

CVE & CISA-KEV Catalog

CVE-2021-24245

MEDIUMEPSS 92th pctl

6.1

CVSS v3

NVD

Description

The Stop Spammers WordPress plugin before 2021.9 did not escape user input when blocking requests (such as matching a spam word), outputting it in an attribute after sanitising it to remove HTML tags, which is not sufficient and lead to a reflected Cross-Site Scripting issue.

CWE-79Cross-Site Scripting (XSS)

How to fix

Remediation Available

stop spammersNVD

Affected:< 2021.9Fixed in:2021.9CVE-2021-24245derived 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 RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

5.72%probability of exploitation in 30 days

92ndpercentile

High risk: more likely to be exploited than 92% of all known CVEs.

References

Exploit2

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.