What is CVE-2012-4451?

CVE-2012-4451 is a medium-severity vulnerability in Zend Framework, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-01-03.

How severe is CVE-2012-4451?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Zend Framework

CVE-2012-4451

Multiple cross-site scripting (XSS) vulnerabilities in Zend Framework 2.0.x before 2.0.1 allow remote attackers to inject arbitrary web script or HTML via unspecified input to (1) Debug, (2) Feed\PubSubHubbub, (3) Log\Formatter\Xml, (4) Tag\Cloud\Decorator, (5) Uri, (6) View\Helper\HeadStyle, (7) View\Helper\Navigation\Sitemap, or (8) View\Helper\Placeholder\Container\AbstractStandalone, related to Escaper.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2020-01-03 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.014 (70.8th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 70.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Zend Framework
Zend Technologies Framework — versions 2.0.x before 2.0.1
Fedoraproject Fedora — versions 16, 17
Red Hat Enterprise Linux — versions 6.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

bugs.debian.org/cgi-bin/bugreport.cgi (Mailing List, Third Party Advisory)
bugs.gentoo.org/show_bug.cgi (Third Party Advisory)
seclists.org/oss-sec/2012/q3/571 (Patch, Mailing List, Third Party Advisory)
seclists.org/oss-sec/2012/q3/573 (Patch, Mailing List, Third Party Advisory)
framework.zend.com/security/advisory/ZF2012-03 (Vendor Advisory)
bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
github.com/zendframework/zf2/commit/27131ca9520bdf1d4c774c71459eba32f2b10733 (Patch, Third Party Advisory)
www.securityfocus.com/bid/55636 (VDB Entry, Third Party Advisory)

Frequently asked questions

What is CVE-2012-4451?: CVE-2012-4451 is a medium-severity vulnerability in Zend Framework, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-01-03.
How severe is CVE-2012-4451?: Medium severity. CVSS v3 base score is 6.1 out of 10.