What’s Vulnerable › Vulnerabilities

CVE-2023-6938: Oxygen Builder <= 4.8 - Authenticated (Contributor+) Stored Cross-Site Scripting via Custom Field

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-01-11 · updated 2026-06-17
• Weakness: CWE-79

Description

The Oxygen Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via a custom field in all versions up to, and including, 4.8 due to insufficient input sanitization and output escaping. 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. NOTE: Version 4.8.1 of the Oxygen Builder plugin for WordPress addresses this vulnerability by implementing an optional filter to provide output escaping for dynamic data. Please see https://oxygenbuilder.com/documentation/other/security/#filtering-dynamic-data for more details.

Affected products

• Oxygen Builder: before 4.8.1 — fixed in 4.8.1

How to fix

Upgrade to a fixed version: Oxygen Builder 4.8.1. Check the vendor advisory for mitigations.

References

• https://oxygenbuilder.com/oxygen-4-8-1-now-available/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/ee069cb3-370e-48ea-aa35-c30fe83c2498?source=cve
• https://oxygenbuilder.com/oxygen-4-8-1-now-available/
• https://www.wordfence.com/threat-intel/vulnerabilities/id/ee069cb3-370e-48ea-aa35-c30fe83c2498?source=cve

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