Is CVE-2012-4558 in the CISA KEV catalog?

No. CVE-2012-4558 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2012-4558?

CVE-2012-4558 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2012-4558?

CVE-2012-4558 has an EPSS score of 22.91% (97th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2012-4558

MEDIUMEPSS 97th pctl

4.3

CVSS v2

NVD

Description

Multiple cross-site scripting (XSS) vulnerabilities in the balancer_handler function in the manager interface in mod_proxy_balancer.c in the mod_proxy_balancer module in the Apache HTTP Server 2.2.x before 2.2.24-dev and 2.4.x before 2.4.4 allow remote attackers to inject arbitrary web script or HTML via a crafted string.

CWE-79Cross-Site Scripting (XSS)

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

22.91%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

References

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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 2026-04-29.