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Description

The Post Blocks & Tools plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'sliderStyle' block attribute in the Posts Slider block in all versions up to, and including, 1.3.0 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

PUBLISHED Reserved 2026-04-06 | Published 2026-04-08 | Updated 2026-04-09 | Assigner Wordfence




MEDIUM: 6.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Problem types

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

Product status

Default status
unaffected

Any version
affected

Timeline

2026-04-06:Vendor Notified
2026-04-08:Disclosed

Credits

Athiwat Tiprasaharn finder

References

www.wordfence.com/...-0851-45e8-ada9-ff0427b7f17a?source=cve

plugins.trac.wordpress.org/...c/blocks/posts/slider/view.php

plugins.trac.wordpress.org/...c/blocks/posts/slider/view.php

plugins.trac.wordpress.org/...c/blocks/posts/slider/view.php

plugins.trac.wordpress.org/...%2Ftrunk&sfp_email=&sfph_mail=

cve.org (CVE-2026-5711)

nvd.nist.gov (CVE-2026-5711)

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