Protected-content disclosure via password regex injection
Published Sep 2, 2026 · Updated Sep 2, 2026
Incorrect authorization in WP Chill Passster before 4.2.24 allows remote attackers to read password-protected content through its AJAX handler. The validate_input action interprets attacker-controlled input as a regular expression, so the wildcard .* satisfies password validation and returns protected shortcode content. No account is required because the page exposes the nonce and post ID needed for the crafted request; disclosure is limited to configured protected content.
Summary
What happened
Incorrect authorization in WP Chill Passster before 4.2.24 allows remote attackers to read password-protected content through its AJAX handler. The validate_input action interprets attacker-controlled input as a regular expression, so the wildcard .* satisfies password validation and returns protected shortcode content. No account is required because the page exposes the nonce and post ID needed for the crafted request; disclosure is limited to configured protected content.
The record
- CVE
- CVE-2025-15489
- Published
- Sep 2, 2026
- Updated
- Sep 2, 2026
- Vendor
- WP Chill
- Product
- Passster
- Classifications
- CWE-863, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 2, 2026CVE publishedPublication date reported by the CVE source.
- Sep 2, 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 <4.2.24
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.
Public exploit references
- WPScan Passster password-regex proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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