Information disclosure of source code in SimpleSAMLphp
Background
The module controller in SimpleSAML\Module that processes requests for pages
hosted by modules, has code to identify paths ending with .php and process
those as PHP code. If no other suitable way of handling the given path exists it
presents the file to the browser.
Description
The check to identify paths ending with .php does not account for uppercase
letters. If someone requests a path ending with e.g. .PHP and the server is
serving the code from a case-insensitive file system, such as on Windows, the
processing of the PHP code does not occur, and the source code is instead
presented to the browser.
Affected versions
SimpleSAMLphp versions 1.18.5 and older.
Impact
An attacker may use this issue to gain access to the source code in third-party modules that is meant to be private, or even sensitive. However, the attack surface is considered small, as the attack will only work when SimpleSAMLphp serves such content from a file system that is not case-sensitive, such as on Windows.
Resolution
Upgrade the SimpleSAMLphp installation to version 1.18.6.
Credit
This vulnerability was discovered and reported by Sławek Naczyński.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | simplesamlphp/simplesamlphp | < 1.18.6 | 1.18.6 |
References
- https://github.com/simplesamlphp/simplesamlphp/security/advisories/GHSA-24m3-w8g9-jwpq
- https://nvd.nist.gov/vuln/detail/CVE-2020-5301
- https://github.com/simplesamlphp/simplesamlphp/commit/47968d26a2fd3ed52da70dc09210921d612ce44e
- https://github.com/FriendsOfPHP/security-advisories/blob/master/simplesamlphp/simplesamlphp/CVE-2020-5301.yaml
- https://github.com/simplesamlphp/simplesamlphp
- https://simplesamlphp.org/security/202004-01
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:N/A:N- Weakness (CWE)
CWE-178, CWE-200- Platform
- Composer
- Package
simplesamlphp/simplesamlphp- Disclosed
- 22.04.2020
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-24m3-w8g9-jwpq - CC BY 4.0
Vulnerability history: simplesamlphp/simplesamlphp
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 23
- First → latest
- 01.2020 07.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 3
- High 4
- Medium 12
- Low 4
Disclosures per year
- 2020: 6
- 2021: 0
- 2022: 12
- 2023: 0
- 2024: 4
- 2025: 0
- 2026: 1
-
Information disclosure of source code in SimpleSAMLphp this entry
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