ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2025-8567

The Nexter Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple widgets in all versions up to, and including, 4.5.4 due to insufficient input sanit

Published Aug 19, 2025 · catalog updated Apr 8, 2026 · Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder

Last checked Oct 26, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-8567. EPSS is 0.25%. Act only if a listed version of Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.25%
Remediation
Vendor / distro source
Affected products
vendor posimyththemes Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder 0 ≤4.5.4

The Nexter Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple widgets in all versions up to, and including, 4.5.4 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor posimyththemes Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder 0 ≤4.5.40 ≤4.5.4

How to fix CVE-2025-8567

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-8567. EPSS is 0.25%. Act only if a listed version of Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder is installed.

Which versions are affected?

Compare what you have installed with posimyththemes Nexter Blocks – Gutenberg Blocks, Page Builder & AI Website Builder 0 ≤4.5.4 0 ≤4.5.4. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.25%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 19, 2025 · EUVD

    Detected

    The Nexter Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple widgets in all versions up to, and including, 4.5.4 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a

  2. Apr 8, 2026 · EUVD

    Updated

    The Nexter Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple widgets in all versions up to, and including, 4.5.4 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a

Sources

  • CVE.orgVulnerability recordCVE-2025-8567

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-8567

    30-day exploitation probability 0.25%

    first.org
  • EUVDVulnerability recordEUVD-2025-28801

    The Nexter Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via multiple widgets in all versions up to, and including, 4.5.4 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated at

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 23, 2026
  • CVE.orgOct 22, 2026
  • EUVDOct 21, 2026