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CriticalVulnerabilityCVE-2026-62003updated 29 Oct 2026, 20:04 UTC

Mission plugin lets outsiders inject malicious data into websites

A flaw in the Mission plugin could let anyone, without logging in, send specially crafted data that makes the website run harmful code. Attackers could then take over the site or steal its data.

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. 1Attacker sends crafted requestNo login needed to reach the plugin
  2. 2Plugin unserializes inputUntrusted data becomes PHP objects
  3. 3Malicious code runsAttacker executes commands on the server
  4. 4Site compromisedData can be stolen or changed
  5. ResultAttacker takes control of the website

What happened

Unauthenticated PHP Object Injection in the Mission plugin, versions 1.22 and earlier, allows untrusted input to be unserialized into PHP objects.

Why it is dangerous: Successful exploitation can lead to remote code execution, full site takeover, and theft or deletion of data. Anyone who can reach the website is a potential attacker.

Are you affected?

You are affected if you run the Mission plugin version 1.22 or earlier on your WordPress site.

Mission plugin <= 1.22

What to do

  1. Check whether the Mission plugin is installed and note its version
  2. Update Mission to a version newer than 1.22 if one is available, or deactivate and remove it
  3. Check the vendor or the GitHub advisory for an official fix or mitigation
  4. Review the site for unexpected admin users or files if the plugin was exposed

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, 20:04 UTC
    GitHub Advisory reported on it · GitHub Advisory

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-62003 · GHSA-w3qf-v62m-wqc8
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, 20:04 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

Mission plugin lets outsiders inject malicious data into websites · Zero Radar