CVE-2012-6513: Cross-site scripting (XSS) vulnerability in index.php/Admin_Preferences in gpEasy CMS 2.3.3 allows remote atta

Routine

MEDIUM 4.3DOWNGRADE

CVE-2012-6513 is a medium-severity flaw (CVSS 4.3) affecting gpeasy cms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in index.php/Admin_Preferences in gpEasy CMS 2.3.3 allows remote attackers to inject arbitrary web script or HTML via the jsoncallback parameter.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Weakness	CWE-79
Published	2013-01-24
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: gpeasy

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

Am I affected?

Timeline

2013-01-24 01:55 UTCPublished CVE record published
2026-06-16 23:48 UTCUpdated Record last modified

gpeasy gpeasy cms DOWNGRADE

Affected: 2.3.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3.3

1. Check installed version

apt-cache policy gpeasy-cms || rpm -q gpeasy-cms || gpeasy-cms --version

2. No fixed release: DOWNGRADE to a release before 2.3.3 (Debian / Ubuntu)

apt-cache madison gpeasy-cms sudo apt install gpeasy-cms=<VERSION_BEFORE_2.3.3> sudo apt-mark hold gpeasy-cms

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list gpeasy-cms sudo dnf downgrade gpeasy-cms-<VERSION_BEFORE_2.3.3> sudo dnf versionlock add gpeasy-cms

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: gpEasy 2.3.3 - 'jsoncallback' Cross-Site Scripting

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-2012-6513?

gpeasy cms: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2012-6513 being exploited?

CVE-2012-6513 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-2012-6513 affect?

CVE-2012-6513 affects gpeasy cms. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in index.php/Admin_Preferences in gpEasy CMS 2.3.3 allows remote attackers to inject arbitrary web script or HTML via the jsoncallback parameter.

How urgent is CVE-2012-6513?

Priority 39/100. Public exploit reference

Software pages

PHP vulnerabilities

Related CVEs

CVE-2013-0807 MEDIUM 4.3 UPGRADE Cross-site scripting (XSS) vulnerability in the NewSectionPrompt function in include/tool/editing_page.php in

References

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