Threat intelligence

Spectra Gutenberg Blocks <= 2.19.28 - Authenticated (Contributor+) Stored Cross-Site Scripting via uagb/image Block

CVE-2026-12900 · ultimate-addons-for-gutenberg

Important: Seeing this vulnerability listed does not mean your website is affected. Exposure depends on whether you run Ultimate Addons For Gutenberg at a vulnerable version. How SiteRespond intelligence works

Vulnerability: Spectra Gutenberg Blocks <= 2.19.28 - Authenticated (Contributor+) Stored Cross-Site Scripting via uagb/image Block
Affected software: ultimate-addons-for-gutenberg(Plugin)
Affected versions: ≤ 2.19.28
Authentication: Authenticated (see advisory title)
Vulnerability type: Cross-site scripting
CVE: CVE-2026-12900
Published: 20 July 2026
CISA KEV: Not listed in CISA KEV at last catalog refresh
Impact: May allow attackers to run scripts in visitors' browsers or hijack admin sessions.
Source: Data imported from Wordfence Intelligence (advisory 0e9dc5e3-9d72-4c04-8ba9-56428a6fdddd). Methodology and redistribution notes

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