CVE-2015-9406: Directory traversal vulnerability in the mTheme-Unus theme before 2.3 for WordPress allows an attacker to read

Q: How do I fix CVE-2015-9406?

mtheme-unus: upgrade to 2.3. Exact commands for each OS are on this page.

Q: Is CVE-2015-9406 being exploited?

CVE-2015-9406 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-2015-9406 affect?

CVE-2015-9406 affects mtheme-unus. Severity is high (CVSS 7.5). Directory traversal vulnerability in the mTheme-Unus theme before 2.3 for WordPress allows an attacker to read arbitrary files via a .. (dot dot) in the files parameter to css/css.php.

Q: How urgent is CVE-2015-9406?

Priority 61/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2015-9406 is a high-severity flaw (CVSS 7.5) affecting mtheme-unus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Directory traversal vulnerability in the mTheme-Unus theme before 2.3 for WordPress allows an attacker to read arbitrary files via a .. (dot dot) in the files parameter to css/css.php.

Why this priority

High severity
EPSS top 1%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	55.0% (top 1%)
CISA exploited list	No
Weakness	CWE-22
Published	2019-09-20
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: mtheme-unus project

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

Am I affected?

Timeline

2019-09-20 20:15 UTCPublished CVE record published
2026-06-17 00:36 UTCUpdated Record last modified

mtheme-unus project mtheme-unus UPGRADE

Affected: < 2.3

Fixed in: 2.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mtheme-unus || rpm -q mtheme-unus || mtheme-unus --version

2. UPGRADE to 2.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mtheme-unus

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mtheme-unus

Note

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

Public exploits and detection

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

Metasploit: WordPress Mobile Edition File Read Vulnerability
Nuclei scan template: mTheme Unus < 2.3 - Directory Traversal

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-2015-9406?

mtheme-unus: upgrade to 2.3. Exact commands for each OS are on this page.

Is CVE-2015-9406 being exploited?

CVE-2015-9406 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-2015-9406 affect?

CVE-2015-9406 affects mtheme-unus. Severity is high (CVSS 7.5). Directory traversal vulnerability in the mTheme-Unus theme before 2.3 for WordPress allows an attacker to read arbitrary files via a .. (dot dot) in the files parameter to css/css.php.

How urgent is CVE-2015-9406?

Priority 61/100. High severity; EPSS top 1%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

WordPress vulnerabilities · PHP vulnerabilities

References

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