Ova Advent <= 1.1.7 - Authenticated (Contributor+) Stored Cross-Site Scripting via Shortcode

2025-10-14 16:42

Marco Wotschka

Strategic Overview

Status

Patched in 1.1.8

Affected PluginOva Advent

Affected Version<= 1.1.7

CVSS6.4Medium

CVECVE-2025-8561

View all Ova Advent vulnerabilities

Vulnerability Overview

The Ova Advent plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's shortcodes in all versions up to, and including, 1.1.7 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.

Technical Analysis

REMEDIATION: Update to version 1.1.8, or a newer patched version --- IDENTIFIER: CWE-87 (Improper Neutralization of Alternate XSS Syntax) The product does not neutralize or incorrectly neutralizes user-controlled input for alternate script syntax.

External References

https://www.cve.org/CVERecord?id=CVE-2025-8561 https://www.wordfence.com/threat-intel/vulnerabilities/id/da6bf521-0c22-4839-8fa6-a0d67e28cfbd

CVSS Vector

6.4

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone

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