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CriticalVulnerabilityCVE-2026-61997updated 29 Oct 2026, 20:04 UTC

Legal Stone WordPress plugin: anyone can inject malicious data into the site

Attackers without a login can send specially crafted data to the site, which may let them run code or take control of the website. Anyone running the affected plugin should update or remove it 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. 1AttackerNo login or account needed
  2. 2Crafted requestMalicious serialized data sent to site
  3. 3Plugin unserializes inputUntrusted data processed unsafely
  4. 4Code runs on serverObject injection triggers dangerous behavior
  5. ResultAttacker may take control of the site

What happened

Legal Stone up to and including version 1.2.11 has an unauthenticated PHP Object Injection flaw, where untrusted input is unsafely deserialized.

Why it is dangerous: An attacker needing no account could potentially execute code, read or change data, or fully compromise the website and its visitors. Sites running the plugin are at risk.

Are you affected?

You are affected if your site runs the Legal Stone plugin at version 1.2.11 or earlier.

Legal Stone <= 1.2.11

What to do

  1. Check whether Legal Stone is installed and what version it is
  2. If a version newer than 1.2.11 is available, update the plugin now
  3. If no fixed version is available, deactivate and remove the plugin until a fix is released
  4. Review the site for unexpected admin users, files, or changes

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-2026-61997 · GHSA-xwwc-gcfq-7vxc
CVSS
9.8 / 10
EPSS
0.5% 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

Legal Stone WordPress plugin: anyone can inject malicious data into the site · Zero Radar