CVE-2012-4558

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.

Published: 2013-02-26 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2012-4558 is rated Moderate Risk (46.3/100): CVSS Medium severity, with high exploitation likelihood (EPSS 22.91%, 97th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2012-4558

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 58.22% 22.91% -35.31%
2 2026-05-11 58.48% 58.22% -0.26%
3 2026-05-02 — 58.48% —

Full EPSS history (45 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2012-4558

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2012-4558

OS Trackers for CVE-2012-4558

vendor priority summary link
debian low CVE-2012-4558 low priority: Debian including 1 source packages (apache2), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2012-4558
redhat medium — https://access.redhat.com/security/cve/CVE-2012-4558
ubuntu medium CVE-2012-4558 medium priority: Ubuntu including 1 source packages (apache2), 6 status rows across 6 suites (hardy, lucid, oneiric, precise, quantal, upstream): released 6. https://ubuntu.com/security/CVE-2012-4558

Affected software / configurations for CVE-2012-4558

Vendor Product Version Raw CPE
apache http_server 2.2 cpe:2.3:a:apache:http_server:2.2:*:*:*:*:*:*:*
apache http_server 2.2.0 cpe:2.3:a:apache:http_server:2.2.0:*:*:*:*:*:*:*
apache http_server 2.2.1 cpe:2.3:a:apache:http_server:2.2.1:*:*:*:*:*:*:*
apache http_server 2.2.2 cpe:2.3:a:apache:http_server:2.2.2:*:*:*:*:*:*:*
apache http_server 2.2.3 cpe:2.3:a:apache:http_server:2.2.3:*:*:*:*:*:*:*
apache http_server 2.2.4 cpe:2.3:a:apache:http_server:2.2.4:*:*:*:*:*:*:*
apache http_server 2.2.6 cpe:2.3:a:apache:http_server:2.2.6:*:*:*:*:*:*:*
apache http_server 2.2.8 cpe:2.3:a:apache:http_server:2.2.8:*:*:*:*:*:*:*
apache http_server 2.2.9 cpe:2.3:a:apache:http_server:2.2.9:*:*:*:*:*:*:*
apache http_server 2.2.10 cpe:2.3:a:apache:http_server:2.2.10:*:*:*:*:*:*:*
apache http_server 2.2.11 cpe:2.3:a:apache:http_server:2.2.11:*:*:*:*:*:*:*
apache http_server 2.2.12 cpe:2.3:a:apache:http_server:2.2.12:*:*:*:*:*:*:*
apache http_server 2.2.13 cpe:2.3:a:apache:http_server:2.2.13:*:*:*:*:*:*:*
apache http_server 2.2.14 cpe:2.3:a:apache:http_server:2.2.14:*:*:*:*:*:*:*
apache http_server 2.2.15 cpe:2.3:a:apache:http_server:2.2.15:*:*:*:*:*:*:*
apache http_server 2.2.16 cpe:2.3:a:apache:http_server:2.2.16:*:*:*:*:*:*:*
apache http_server 2.2.17 cpe:2.3:a:apache:http_server:2.2.17:*:*:*:*:*:*:*
apache http_server 2.2.18 cpe:2.3:a:apache:http_server:2.2.18:*:*:*:*:*:*:*
apache http_server 2.2.19 cpe:2.3:a:apache:http_server:2.2.19:*:*:*:*:*:*:*
apache http_server 2.2.20 cpe:2.3:a:apache:http_server:2.2.20:*:*:*:*:*:*:*
apache http_server 2.2.21 cpe:2.3:a:apache:http_server:2.2.21:*:*:*:*:*:*:*
apache http_server 2.2.22 cpe:2.3:a:apache:http_server:2.2.22:*:*:*:*:*:*:*
apache http_server 2.2.23 cpe:2.3:a:apache:http_server:2.2.23:*:*:*:*:*:*:*
apache http_server 2.4.0 cpe:2.3:a:apache:http_server:2.4.0:*:*:*:*:*:*:*
apache http_server 2.4.1 cpe:2.3:a:apache:http_server:2.4.1:*:*:*:*:*:*:*
apache http_server 2.4.2 cpe:2.3:a:apache:http_server:2.4.2:*:*:*:*:*:*:*
apache http_server 2.4.3 cpe:2.3:a:apache:http_server:2.4.3:*:*:*:*:*:*:*

References for CVE-2012-4558

URL Tags
http://httpd.apache.org/security/vulnerabilities_22.html Vendor Advisory
http://httpd.apache.org/security/vulnerabilities_24.html Vendor Advisory
http://lists.apple.com/archives/security-announce/2013/Sep/msg00002.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-April/101196.html
http://marc.info/?l=bugtraq&m=136612293908376&w=2
http://rhn.redhat.com/errata/RHSA-2013-0815.html
http://rhn.redhat.com/errata/RHSA-2013-1207.html
http://rhn.redhat.com/errata/RHSA-2013-1208.html
http://rhn.redhat.com/errata/RHSA-2013-1209.html
http://support.apple.com/kb/HT5880
http://svn.apache.org/viewvc/httpd/httpd/trunk/modules/proxy/mod_proxy_balancer.c?r1=1404653&r2=1413732&diff_format=h
http://www.debian.org/security/2013/dsa-2637
http://www.oracle.com/technetwork/topics/security/cpujan2014-1972949.html
http://www.securityfocus.com/bid/58165
http://www.securityfocus.com/bid/64758
https://lists.apache.org/thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/8d63cb8e9100f28a99429b4328e4e7cebce861d5772ac9863ba2ae6f%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/f7f95ac1cd9895db2714fa3ebaa0b94d0c6df360f742a40951384a53%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r05b5357d1f6bd106f41541ee7d87aafe3f5ea4dc3e9bde5ce09baff8%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r476d175be0aaf4a17680ef98c5153b4d336eaef76fb2224cc94c463a%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r57608dc51b79102f3952ae06f54d5277b649c86d6533dcd6a7d201f7%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r75cbe9ea3e2114e4271bbeca7aff96117b50c1b6eb7c4772b0337c1f%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r9821b0a32a1d0a1b4947abb6f3630053fcbb2ec905d9a32c2bd4d4ee%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r9b4b963760a3cb5a4a70c902f325c6c0337fe51d5b8570416f8f8729%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r9ea3538f229874c80a10af473856a81fbf5f694cd7f471cc679ba70b%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rad01d817195e6cc871cb1d73b207ca326379a20a6e7f30febaf56d24%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rd336919f655b7ff309385e34a143e41c503e133da80414485b3abcc9%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rdca61ae990660bacb682295f2a09d34612b7bb5f457577fe17f4d064%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E
https://lists.apache.org/thread.html/rfbaf647d52c1cb843e726a0933f156366a806cead84fbd430951591b%40%3Ccvs.httpd.apache.org%3E
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A18977
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