CVE-2015-4084: Cross-site scripting (XSS) vulnerability in the Free Counter plugin 1.1 for WordPress allows remote attackers

This month

MEDIUM 4.3DOWNGRADE

CVE-2015-4084 is a medium-severity flaw (CVSS 4.3) affecting free counter. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Cross-site scripting (XSS) vulnerability in the Free Counter plugin 1.1 for WordPress allows remote attackers to inject arbitrary web script or HTML via the value_ parameter in a check_stat action to wp-admin/admin-ajax.php.

Why this priority

EPSS top 8%: very likely to be exploited
Public exploit reference

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

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	4.5% (top 8%)
CISA exploited list	No
Weakness	CWE-79
Published	2015-05-28
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: free-counter

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2015-05-28 14:59 UTCPublished CVE record published
2026-06-17 00:26 UTCUpdated Record last modified

free-counter free counter DOWNGRADE

Affected: 1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1

1. Check installed version

apt-cache policy free-counter || rpm -q free-counter || free-counter --version

2. No fixed release: DOWNGRADE to a release before 1.1 (Debian / Ubuntu)

apt-cache madison free-counter sudo apt install free-counter=<VERSION_BEFORE_1.1> sudo apt-mark hold free-counter

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

dnf --showduplicates list free-counter sudo dnf downgrade free-counter-<VERSION_BEFORE_1.1> sudo dnf versionlock add free-counter

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: WordPress Plugin Free Counter 1.1 - Persistent 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-2015-4084?

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

Is CVE-2015-4084 being exploited?

CVE-2015-4084 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-2015-4084 affect?

CVE-2015-4084 affects free counter. Severity is medium (CVSS 4.3). Cross-site scripting (XSS) vulnerability in the Free Counter plugin 1.1 for WordPress allows remote attackers to inject arbitrary web script or HTML via the value_ parameter in a check_stat action to wp-admin/admin-ajax.php.

How urgent is CVE-2015-4084?

Priority 43/100. EPSS top 8%: very likely to be exploited; Public exploit reference

Software pages

WordPress vulnerabilities · PHP vulnerabilities

References

← Back to latest CVEs