Contributor-level stored XSS via unescaped shortcode attributes
Published Jan 16, 2026 · Updated Jan 16, 2026
Stored XSS in the usp_access shortcode in User Submitted Posts 20260110 and earlier allows remote authenticated users to inject scripts. The shortcode processes attacker-controlled attributes without sufficient sanitization and emits them into page output without context-appropriate escaping. Contributor-level access is required, and the stored script executes when any user views the affected post or page.
Summary
What happened
Stored XSS in the usp_access shortcode in User Submitted Posts 20260110 and earlier allows remote authenticated users to inject scripts. The shortcode processes attacker-controlled attributes without sufficient sanitization and emits them into page output without context-appropriate escaping. Contributor-level access is required, and the stored script executes when any user views the affected post or page.
The record
- CVE
- CVE-2026-0913
- Published
- Jan 16, 2026
- Updated
- Jan 16, 2026
- Vendor
- Plugin Planet
- Product
- User Submitted Posts
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 16, 2026CVE publishedPublication date reported by the CVE source.
- Jan 16, 2026Record 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=* <=20260110
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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