Unauthenticated file disclosure via null-byte path traversal
Published Aug 13, 2025 · Updated Apr 7, 2026
Path traversal in S40 CMS 0.4.2 allows remote attackers to read arbitrary local files through the index.php p parameter. The page() function returns the unsanitized p value as a path to index.php's require() call, while a null byte suppresses the appended suffix. No authentication is required; a crafted GET request can disclose readable files outside the web root without changing them.
Summary
What happened
Path traversal in S40 CMS 0.4.2 allows remote attackers to read arbitrary local files through the index.php p parameter. The page() function returns the unsanitized p value as a path to index.php's require() call, while a null byte suppresses the appended suffix. No authentication is required; a crafted GET request can disclose readable files outside the web root without changing them.
The record
- CVE
- CVE-2011-10009
- Published
- Aug 13, 2025
- Updated
- Apr 7, 2026
- Vendor
- S40 CMS
- Product
- S40 CMS
- Classifications
- CWE-22, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 13, 2025CVE publishedPublication date reported by the CVE source.
- Apr 7, 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
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
- Metasploit S40 directory-traversal scanner modulefunctional · demonstrated
- S40 CMS 0.4.2b Local File Inclusion proof of conceptproof 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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