Stored XSS via public diagnostics log write
Published Aug 16, 2026 · Updated Aug 16, 2026
Stored XSS in Bookly for WordPress 27.7 and earlier allows remote attackers to execute script via the update-addons AJAX action. The bookly_speed_up_update_addons endpoint is exposed through a wp_ajax_nopriv_* handler; when signature validation fails, attacker-controlled data is written verbatim to the bookly_log.details field and later rendered by the Diagnostics → Logs interface without neutralization. No authentication is required to plant the payload, but execution depends on an administrator later opening that log view, constraining impact to code running in that browser session.
Summary
What happened
Stored XSS in Bookly for WordPress 27.7 and earlier allows remote attackers to execute script via the update-addons AJAX action. The bookly_speed_up_update_addons endpoint is exposed through a wp_ajax_nopriv_* handler; when signature validation fails, attacker-controlled data is written verbatim to the bookly_log.details field and later rendered by the Diagnostics → Logs interface without neutralization. No authentication is required to plant the payload, but execution depends on an administrator later opening that log view, constraining impact to code running in that browser session.
The record
- CVE
- CVE-2026-13424
- Published
- Aug 16, 2026
- Updated
- Aug 16, 2026
- Vendor
- Ladela Interactive
- Product
- Bookly
- Classifications
- CWE-79, T1059.007
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 16, 2026CVE publishedPublication date reported by the CVE source.
- Aug 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=0 <=27.7
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
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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