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CriticalVulnerabilityCVE-2026-119526updated 30 Oct 2026, 23:26 UTC

Royal Event WordPress theme can be hijacked through untrusted data

A flaw lets an attacker send specially crafted data to the Royal Event theme that the website then trusts and processes. This can let the attacker take control of the website.

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

What happened

The Royal Event theme by ThemeREX has a deserialization of untrusted data flaw, which allows object injection. All versions through 2.0 are affected.

Why it is dangerous: Successful exploitation of this critical flaw (CVSS 9.8) could let an attacker run harmful code or gain control of the site and its data. Websites running this theme are at risk.

Are you affected?

You are affected if you run the Royal Event theme, version 2.0 or earlier, on your website.

Royal Event (ThemeREX) - all versions through 2.0

What to do

  1. Check whether your site uses the Royal Event theme and which version is installed.
  2. Check the ThemeREX site or the GitHub advisory for a fixed version and update as soon as one is released.
  3. If no fix is available, deactivate the theme or restrict access to the site until a patch exists.
  4. Review the site for signs of unauthorized changes or new admin accounts.

Timeline

  1. 30 Oct 2026, 19:18 UTC
    Publicly disclosed
  2. 30 Oct 2026, 19:18 UTC
    Reported by NVD · NVD
  3. 30 Oct 2026, 19:19 UTC
    Picked up by Zero Radar
  4. 30 Oct 2026, 23:26 UTC
    GitHub Advisory reported on it · GitHub Advisory

Sources 2 reports, oldest first

Official vendor, government CERT or advisory database

Technical details

ID
CVE-2026-119526 · GHSA-jhpc-jcvx-rg2p
CVSS
9.8 / 10
EPSS
0.4% chance of exploitation within 30 days
Disclosed
30 Oct 2026, 19:18 UTC
On Zero Radar
30 Oct 2026, 19:19 UTC (1 min after disclosure)
Last change
30 Oct 2026, 23:26 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

Royal Event WordPress theme can be hijacked through untrusted data · Zero Radar