Unpublished post-title disclosure via pingback oracle
Published Jul 21, 2025 · Updated Jul 21, 2025
Information disclosure in WordPress 3.5 through 6.8.2 allows remote attackers to infer unpublished post titles via XML-RPC pingbacks. In wp_xmlrpc_server::pingback_ping, fragment handling strips nonalphanumeric characters and queries titles across all post statuses instead of restricting the lookup to published posts. Unauthenticated access to xmlrpc.php and pingback.ping is sufficient; differential callbacks or the built-in one-second delay reveal whether each guessed substring occurs, disclosing titles but not post bodies.
Summary
What happened
Information disclosure in WordPress 3.5 through 6.8.2 allows remote attackers to infer unpublished post titles via XML-RPC pingbacks. In wp_xmlrpc_server::pingback_ping, fragment handling strips nonalphanumeric characters and queries titles across all post statuses instead of restricting the lookup to published posts. Unauthenticated access to xmlrpc.php and pingback.ping is sufficient; differential callbacks or the built-in one-second delay reveal whether each guessed substring occurs, disclosing titles but not post bodies.
The record
- CVE
- CVE-2025-54352
- Published
- Jul 21, 2025
- Updated
- Jul 21, 2025
- Vendor
- WordPress.org
- Product
- WordPress
- Classifications
- CWE-669
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 21, 2025CVE publishedPublication date reported by the CVE source.
- Jul 21, 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=3.5 <=6.8.2
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
- WordPress XML-RPC Title Leak Vulnerability Testerproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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