CVE-2012-4451: Multiple cross-site scripting (XSS) vulnerabilities in Zend Framework 2.0.x before 2.0.1 allow remote attacker

Q: How do I fix CVE-2012-4451?

zend framework: upgrade to 2.0.1; fedora: mitigate or apply the listed mitigation; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2012-4451 being exploited?

CVE-2012-4451 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2012-4451 affect?

CVE-2012-4451 affects zend framework, fedora, enterprise linux. Severity is medium (CVSS 6.1). 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

Q: How urgent is CVE-2012-4451?

Priority 44/100. On your watchlist

This month

MEDIUM 6.1WATCHLISTUPGRADEMITIGATEMITIGATE

CVE-2012-4451 is a medium-severity flaw (CVSS 6.1) affecting zend framework, fedora, enterprise linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-79
Published	2020-01-03
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: fedoraproject · redhat · zend

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-01-03 17:15 UTCPublished CVE record published
2026-06-16 23:45 UTCUpdated Record last modified

zend zend framework UPGRADE

Affected: < 2.0.1

Fixed in: 2.0.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy zend-framework || rpm -q zend-framework || zend-framework --version

2. UPGRADE to 2.0.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade zend-framework

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade zend-framework

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

fedoraproject fedora MITIGATE

Affected: 16 · 17

Fixed in: no fixed release known

Safe to downgrade to: a release before 16

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

redhat enterprise linux MITIGATE

Affected: 6.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2012-4451?

zend framework: upgrade to 2.0.1; fedora: mitigate or apply the listed mitigation; enterprise linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2012-4451 being exploited?

CVE-2012-4451 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2012-4451 affect?

CVE-2012-4451 affects zend framework, fedora, enterprise linux. Severity is medium (CVSS 6.1). 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

How urgent is CVE-2012-4451?

Priority 44/100. On your watchlist

Related CVEs

CVE-2020-29312 CRITICAL 9.8 UPGRADE An issue found in Zend Framework v.3.1.3 and before allow a remote attacker to execute arbitrary code via the
CVE-2021-3007 CRITICAL 9.8 UPGRADE DOWNGRADE Laminas Project laminas-http before 2.14.2, and Zend Framework 3.0.0, has a deserialization vulnerability that
CVE-2016-6233 CRITICAL 9.8 MITIGATE UPGRADE The (1) order and (2) group methods in Zend_Db_Select in the Zend Framework before 1.12.19 might allow remote
CVE-2016-4861 CRITICAL 9.8 MITIGATE UPGRADE The (1) order and (2) group methods in Zend_Db_Select in the Zend Framework before 1.12.20 might allow remote
CVE-2016-10034 CRITICAL 9.8 UPGRADE UPGRADE The setFrom function in the Sendmail adapter in the zend-mail component before 2.4.11, 2.5.x, 2.6.x, and 2.7.x

References

← Back to latest CVEs