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PatchSiren cyber security CVE debrief

CVE-2026-2573 ataurr CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-09-03T13:05:06.937Z and has not been modified since then. The GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'postBodyCss' parameter in all versions up to, and including, 2.4.4 due to insufficient input sanitization and output escaping. This vulnerability allows 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. Evidence is limited to public sources and may not reflect the full scope of affected systems or potential impact. Limited verification has been conducted based on available information.

Vendor
ataurr
Product
GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor
CVSS
MEDIUM 6.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-03
Original CVE updated
2026-09-03
Advisory published
2026-09-03
Advisory updated
2026-09-03

Who should care

WordPress site administrators and users with Contributor-level access who use the GutenKit plugin are at risk. They should review and verify GutenKit plugin versions, restrict Contributor-level access, and monitor for suspicious page changes to mitigate potential impact. Additionally, implementing web application firewall rules and educating users on secure content creation are recommended.

Technical summary

The GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'postBodyCss' parameter in all versions up to, and including, 2.4.4 due to insufficient input sanitization and output escaping. This vulnerability allows 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. The vulnerability affects WordPress site administrators and users with Contributor-level access who use the GutenKit plugin.

Defensive priority

Authenticated attackers with Contributor-level access could inject web scripts via the 'postBodyCss' parameter in the GutenKit plugin.

Recommended defensive actions

  • Inventory and verify GutenKit plugin version
  • Restrict Contributor-level access
  • Monitor for suspicious page changes
  • Implement web application firewall rules
  • Educate users on secure content creation
  • Review compensating controls for exposed systems
  • Track exceptions and retest remediated assets

Evidence notes

The GutenKit plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'postBodyCss' parameter. Authenticated attackers with Contributor-level access could inject web scripts. The CVE record was published on 2026-09-03T13:05:06.937Z and has not been modified since then. Evidence is limited to public sources and may not reflect the full scope of affected systems or potential impact.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-2573 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-2573

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-2573 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-2573

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.