8.8

CVE-2026-6261: muffingroup betheme

CVSS: 8.8v3.1HighDeferred
Published 05-05-2026Last modified 05-05-2026
Open JSON

Vulnerability summary

CVE-2026-6261 is a high (CVSS 8.8) vulnerability in muffingroup betheme. EPSS estimates a 0.79% chance of exploitation in the next 30 days, higher than 55.4% of scored vulnerabilities. Fixed in 28.4.1.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.79%
0%100%
Low · +0.17 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 05-05-2026
    PublishedVulnerability first disclosed.
  2. 05-05-2026
    Last modifiedVulnerability information updated.

Description

The Betheme theme for WordPress is vulnerable to Arbitrary File Upload in versions up to, and including, 28.4. This is due to the upload_icons() function workflow moving and unzipping user-controlled ZIP files into a public uploads directory without validating extracted file types. This makes it possible for authenticated attackers, with author-level access and above, to upload arbitrary files (including PHP) and achieve remote code execution via the Icons icon-pack upload flow.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.79%

Chance of exploitation in the next 30 days

Percentile

55%

Versus all other CVEs

30-day change

+0.17 pp

From 0.61% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.79%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Muffingroup1 product
Wordpress1 product
  • betheme≤ 28.4 (fixed in 28.4.1)

2 vendors · 2 products

References

3 links