CVE-2026-6255CWE-79

Simple Owl Shortcodes <= 2.1.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'num' Shortcode Attribute

Medium · published May 5, 2026

CVSS v3.1
6.4
EPSS
0%
Percentile
23.8
In the wild
Unconfirmed
What it is

The Simple Owl Shortcodes plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'num' attribute of the 'owls_wrapper' shortcode in all versions up to, and including, 2.1.1 due to insufficient input sanitization and output escaping on user supplied attributes. 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.

The record
Technical detail
CVSS v3.1
6.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00321 · 23.8th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-05-05T02:26Z
EPSS history
Timeline
  • 05 MAY 02:26Z
    Simple Owl Shortcodes <= 2.1.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'num' Shortcode Attribute
    cvelistv5