Stored XSS via injectable shortcode wrapper
Published May 5, 2026 · Updated May 5, 2026
Stored XSS in PublishPress Future 4.10.0 and earlier allows remote authenticated users to inject scripts through the [futureaction] shortcode. The shortcode controller applies esc_html() to the wrapper value, then uses that value as an HTML tag name in sprintf(), allowing spaces to introduce event-handler attributes. Administrator access is normally required, although sites that expose the shortcode to contributors extend the gate; the injected script runs when a user opens the affected page.
Summary
What happened
Stored XSS in PublishPress Future 4.10.0 and earlier allows remote authenticated users to inject scripts through the [futureaction] shortcode. The shortcode controller applies esc_html() to the wrapper value, then uses that value as an HTML tag name in sprintf(), allowing spaces to introduce event-handler attributes. Administrator access is normally required, although sites that expose the shortcode to contributors extend the gate; the injected script runs when a user opens the affected page.
The record
- CVE
- CVE-2026-5247
- Published
- May 5, 2026
- Updated
- May 5, 2026
- Vendor
- PublishPress
- Product
- PublishPress Future
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 5, 2026CVE publishedPublication date reported by the CVE source.
- May 5, 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?
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- Affected versionversion=0 <=4.10.0
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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