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CriticalVulnerabilityCVE-2026-62005updated 29 Oct 2026, 20:19 UTC

Muzicon WordPress theme can let attackers run code without logging in

Attackers can send specially crafted data to the Muzicon theme and make the website run commands they choose, without needing a password. Anyone running this theme's older versions should act right away.

Official, 2 sources
SeverityCriticalCVSS 9.8 of 10
Being exploited?UnclearNo reports either way yet
Fix available?UnclearNo fixed version published in the sources yet
How sure is this?Official, 2 sourcesBacked by an official source

How the attack works simplified

  1. 1AttackerSends crafted request without logging in
  2. 2Public requestReaches the vulnerable theme endpoint
  3. 3Unsafe deserializationTheme processes untrusted PHP object data
  4. 4Code executionAttacker-chosen PHP code runs on server
  5. ResultAttacker controls the web server

What happened

Muzicon (version 1.15 and earlier) has an unauthenticated PHP object injection flaw, where untrusted input is unsafely deserialized, which can lead to remote code execution.

Why it is dangerous: Successful exploitation could let an attacker take over the website, read or change its data, or install malware, with no login required. Site owners and visitors who rely on the site are at risk.

Are you affected?

You are affected if you run the Muzicon theme at version 1.15 or earlier.

Muzicon <= 1.15

What to do

  1. Check whether your site uses the Muzicon theme and what version is installed
  2. Update Muzicon to a fixed version as soon as the vendor releases one; check the GitHub advisory for updates
  3. If no fix is available, deactivate the Muzicon theme or restrict access to the site until a fix exists
  4. Review the site for signs of compromise, such as unknown admin accounts or unexpected files

Timeline

  1. 29 Oct 2026, 16:18 UTC
    Publicly disclosed
  2. 29 Oct 2026, 16:18 UTC
    Reported by NVD · NVD
  3. 29 Oct 2026, 16:20 UTC
    Picked up by Zero Radar
  4. 29 Oct 2026, 20:19 UTC
    GitHub Advisory reported on it · GitHub Advisory

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-62005 · GHSA-2hf9-2hp5-cqmq
CVSS
9.8 / 10
EPSS
0.4% chance of exploitation within 30 days
Disclosed
29 Oct 2026, 16:18 UTC
On Zero Radar
29 Oct 2026, 16:20 UTC (2 min after disclosure)
Last change
29 Oct 2026, 20:19 UTC

The plain-language parts and the attack diagram were written by an AI model (anthropic/claude-haiku-5.5) from the sources above. Facts like versions, exploitation and dates come from the sources themselves. How Zero Radar works

Muzicon WordPress theme can let attackers run code without logging in · Zero Radar