CVE-2026-1395

Description

The Gutentools plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Post Slider block's block_id attribute in all versions up to, and including, 1.1.3. This is due to insufficient input sanitization and output escaping combined with a custom unescaping routine that reintroduces dangerous characters. 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.

PUBLISHED Reserved 2026-01-23 | Published 2026-04-22 | Updated 2026-04-22 | Assigner Wordfence

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Timeline

Credits

Athiwat Tiprasaharn finder

Itthidej Aramsri finder

References

www.wordfence.com/...-b993-4c84-b7cc-a2cb511b4097?source=cve

plugins.trac.wordpress.org/...nk/core/blocks/post-slider.php

plugins.trac.wordpress.org/....3/core/blocks/post-slider.php

plugins.trac.wordpress.org/...runk/core/gutentools_block.php

plugins.trac.wordpress.org/...nk/core/blocks/post-slider.php

cve.org (CVE-2026-1395)

nvd.nist.gov (CVE-2026-1395)

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