CVE-2026-12900
MediumCVSS 6.4Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
The Spectra Gutenberg Blocks plugin for WordPress up to version 2.19.28 is vulnerable to Stored Cross-Site Scripting via the `uagb/image` block due to insufficient input sanitization and output escaping. Authenticated attackers with Contributor-level access or higher can inject arbitrary scripts that execute when a page is visited.
Risk Assessment
The organization risks malicious script execution in visitors' browsers, potentially leading to session theft, redirects to malicious sites, or user data theft.
Recommendation
Immediately update the Spectra Gutenberg Blocks plugin to a version above 2.19.28. Until then, restrict permissions for users with Contributor role and above, and implement Content Security Policy (CSP).
Other vulnerabilities in Spectra Gutenberg Blocks
See all- CVE-2026-92294Medium
The Spectra Gutenberg Blocks – Website Builder for the Block Editor plugin for WordPress is vulnerable to limited file deletion due to insufficient file path validation in the '__construct' function in all versions up to, and including, 2.20.4. This makes it possible for unauthenticated attackers to delete theme files on the server.
- CVE-2026-7465High
A vulnerability in the Spectra Gutenberg Blocks plugin for WordPress up to version 2.19.25 allows authenticated attackers with Contributor-level access and above to execute remote code on the server via a two-block payload in post content.
- CVE-2025-11162Medium
The Spectra Gutenberg Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Custom CSS field in all versions up to and including 2.19.14 due to insufficient input sanitization and output escaping. An authenticated attacker with Contributor-level access or higher can inject arbitrary scripts that execute when a user visits the injected page.
Original NVD description (English source)
The Spectra Gutenberg Blocks – Website Builder for the Block Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `uagb/image` block in all versions up to, and including, 2.19.28 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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS