Stored XSS via unescaped banned message setting
Published Jan 2, 2023 · Updated Apr 10, 2025
Stored XSS in Lester Chan WP-Ban before 1.69.1 allows remote authenticated users to inject scripts through plugin settings. The banned_template_message setting stores script-bearing HTML without sanitization, and the ban response renders it without output escaping. Administrator-level access is required; the payload executes for visitors whose request triggers the configured ban rule, including on multisite sites without unfiltered_html.
Summary
What happened
Stored XSS in Lester Chan WP-Ban before 1.69.1 allows remote authenticated users to inject scripts through plugin settings. The banned_template_message setting stores script-bearing HTML without sanitization, and the ban response renders it without output escaping. Administrator-level access is required; the payload executes for visitors whose request triggers the configured ban rule, including on multisite sites without unfiltered_html.
The record
- CVE
- CVE-2022-4260
- Published
- Jan 2, 2023
- Updated
- Apr 10, 2025
- Vendor
- Lester Chan
- Product
- WP-Ban
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Jan 2, 2023CVE publishedPublication date reported by the CVE source.
- Apr 10, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <1.69.1
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- WPScan banned-message stored XSS proof of conceptproof of concept · validated
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Technologies
Your stack
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Your stack
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