PT-2026-20627 · WordPress · Shield Security

Dmitry Ignatyev · Published 2026-02-19 · Updated 2026-02-19 · CVE-2026-0561

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions The Shield Security plugin for WordPress versions prior to 21.0.9

Description The Shield Security plugin for WordPress is susceptible to Reflected Cross-Site Scripting. This is due to inadequate input sanitization and output escaping of the message parameter. An unauthenticated attacker can inject arbitrary web scripts into pages, which will execute if a user is tricked into performing an action, such as clicking a link.

Recommendations Update The Shield Security plugin to version 21.0.9 or later.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-0561

Affected Products

Shield Security

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-0561 · Security Note
• https://wordfence.com/threat-intel/vulnerabilities/id/cb49eb5f-c1ff-4440-8b53-c2515e65da27?source=cve · Note
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3439494%40wp-simple-firewall&new=3439494%40wp-simple-firewall&sfp_email=&sfph_mail= · Note
• https://t.me/CVEtracker/45076 · Telegram Post
• https://twitter.com/CVEnew/status/2024501268761498014 · Twitter Post
• https://research.cleantalk.org/cve-2026-0561 · Note