Which products and versions are affected by CVE-2015-9406?

Affected: mTheme-Unus (Mtheme-Unus Project). The full list is in the CVE brief.

Is CVE-2015-9406 being exploited in the wild?

It is exploited in the wild, listed in Industry KEV feed since Jun 3, 2020.

Is CVE-2015-9406 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2015-9406?

No public exploit code is known.

Is there a fix for CVE-2015-9406?

Fixed versions are available, including mTheme-Unus 2.3.

How urgently should CVE-2015-9406 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Request A Demo

Vulnerability Intelligence

CVE-2015-9406

HighExploited

Directory traversal vulnerability in the mTheme-Unus theme before 2.3 for WordPress allows an attacker to read arbitrary files via a ..

Published Sep 20, 2019 · Updated Jul 18, 2025 · Also known as df53dea5-4497-45ee-8f5c-e43f19a702f9

Key Facts

Patch immediately

CVE-2015-9406 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting mTheme-Unus (Mtheme-Unus Project).
It is exploited in the wild, listed in Industry KEV feed since Jun 3, 2020. No public exploit code is known.
EPSS estimates a 55% probability of exploitation in the next 30 days.
Fixed versions are available, including mTheme-Unus 2.3.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

7.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS (30-day exploit likelihood)

55%

Higher than 99.0% of all scored CVEs

Exploited in the wild

Yes

1 catalog listing

Public exploit code

None known

Get the full CVE-2015-9406 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

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.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
Industry KEV feed	Jun 3, 2020	n/a	Not reported

Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Affected Products

2 affected entries in total

Product	Affected versions	Fixed in
mTheme-UnusMtheme-Unus Project	See advisory	2.3

Patched Releases

mTheme-Unus

2.3

Timeline

Publicly disclosed
Sep 20, 2019
Added to Industry KEV feed
Jun 3, 2020
Last updated
Jul 18, 2025

Weakness Type

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

References

1 more references in the full CVE brief

FAQ

Common Questions.

Directory traversal vulnerability in the mTheme-Unus theme before 2.3 for WordPress allows an attacker to read arbitrary files via a ..
Affected: mTheme-Unus (Mtheme-Unus Project). The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Jun 3, 2020.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including mTheme-Unus 2.3.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Is CVE-2015-9406 Running On Your Attack Surface?

Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.