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CVE-2026-2868: Gutenverse – Ultimate WordPress FSE Blocks Addons & Ecosystem <= 3.5.3 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'separatorIconSVG'

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-05 · updated 2026-06-17
• Weakness: CWE-79

Description

The Gutenverse – Ultimate WordPress FSE Blocks Addons & Ecosystem plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'separatorIconSVG' parameter in versions up to, and including, 3.5.3 due to insufficient input sanitization and output escaping. 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.

Affected products

• jegstudio Gutenverse – Ultimate WordPress FSE Blocks Addons & Ecosystem: through 3.5.3

References

• https://plugins.trac.wordpress.org/changeset/3507804/gutenverse
• https://www.wordfence.com/threat-intel/vulnerabilities/id/cc540e5c-180f-4743-b1fb-608aa0e3ae79?source=cve

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