Stored XSS via ineffective nonce validation
Published Nov 4, 2025 · Updated Nov 4, 2025
Cross-site request forgery in Top Bar Notification for WordPress 1.12 and earlier allows remote attackers to inject stored scripts. The tbn_ajax_add() AJAX handler processes state-changing settings requests without effective nonce verification, allowing attacker-controlled notification content to be stored and rendered. Exploitation requires an administrator to trigger the forged request, after which the injected script executes for visitors who view the notification bar.
Summary
What happened
Cross-site request forgery in Top Bar Notification for WordPress 1.12 and earlier allows remote attackers to inject stored scripts. The tbn_ajax_add() AJAX handler processes state-changing settings requests without effective nonce verification, allowing attacker-controlled notification content to be stored and rendered. Exploitation requires an administrator to trigger the forged request, after which the injected script executes for visitors who view the notification bar.
The record
- CVE
- CVE-2025-12412
- Published
- Nov 4, 2025
- Updated
- Nov 4, 2025
- Vendor
- josereyev
- Product
- Top Bar Notification
- Classifications
- CWE-352, T1204.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 4, 2025CVE publishedPublication date reported by the CVE source.
- Nov 4, 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=* <=1.12
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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