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CVE-2026-25467VulnerabilityPublished

ThemeGrill User · Improper Neutralization of Script-Related HTML Tags

Source GCVE Database

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Authoritative record:CVE-2026-25467· Medium 5.3

Not known to be exploited · CVSS 5.3 Medium : upgrade to 5.3.1 when convenient.

Data as of 29 Oct 2026, 16:52 UTC

CVSS 3.1 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (Patchstack)CVSS 3.15.3
Patch
Available – fixed in 5.3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade User Registration to 5.3.1.

Affected software

ProductAffectedFixed in
User Registrationuser-registrationAffected
  • <5.3.1
Fixed in
  • 5.3.1

AI-suggested

In the meantime, applying web application firewalls or input sanitization measures may help mitigate risk, but these are not official fixes.

Description

A Cross-Site Scripting (XSS) vulnerability exists in the ThemeGrill User Registration plugin up to version 5.3.0. The flaw involves improper neutralization of script-related HTML tags, allowing an attacker to inject code. This vulnerability has a CVSS score of 5.3, indicating medium severity, and affects confidentiality but not integrity or availability.

References

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