PT-2026-40889 · WordPress · Meta Field Block

Dj + 1 · Published 2026-05-14 · Updated 2026-05-14 · CVE-2026-6252

Positive Technologies (AI Summary)

CVSS v3.1

6.4

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Meta Field Block versions prior to 1.5.3

Description The Meta Field Block plugin for WordPress contains a Stored Cross-Site Scripting issue caused by insufficient input sanitization and output escaping. Authenticated attackers with contributor-level access or higher can inject arbitrary web scripts through the tagName block attribute. These scripts execute whenever a user visits the affected page.

Recommendations Update to a version later than 1.5.2. As a temporary workaround, restrict access to the tagName block attribute for users with contributor-level permissions.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-6252

Affected Products

Meta Field Block

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-6252 · Security Note
• https://plugins.trac.wordpress.org/changeset/3517519/display-a-meta-field-as-block/tags/1.5.3/includes/helper-functions.php · Note
• https://t.me/CVEtracker/53760 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2054888463506317488 · Twitter Post
• https://t.me/cveNotify/163412 · Telegram Post
• https://wordfence.com/threat-intel/vulnerabilities/id/e6a70210-39bb-44a2-b71a-6f014691a21c?source=cve · Note