Vulnerability · Published Jan 24, 2020 · Assigned by GitHub_M
CVE-2020-5226Cross-site scripting in SimpleSAMLphp
Medium 4.4
In plain English
A medium-severity cross-site scripting in SimpleSAMLphp from simplesamlphp. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Cross-site scripting in SimpleSAMLphp before version 1.18.4. The www/erroreport.php script allows error reports to be submitted and sent to the system administrator. Starting with SimpleSAMLphp 1.18.0, a new SimpleSAML\Utils\EMail class was introduced to handle sending emails, implemented as a wrapper of an external dependency. This new wrapper allows us to use Twig templates in order to create the email sent with an error report. Since Twig provides automatic escaping of variables, manual escaping of the free-text field in www/errorreport.php was removed to avoid double escaping. However, for those not using the new user interface yet, an email template is hardcoded into the class itself in plain PHP. Since no escaping is provided in this template, it is then possible to inject HTML inside the template by manually crafting the contents of the free-text field.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | simplesamlphp | 1.18.4-1 | DEBIAN-CVE-2020-5226 |
| Debian:14 | simplesamlphp | 1.18.4-1 | DEBIAN-CVE-2020-5226 |
| Packagist | simplesamlphp/simplesamlphp | 1.18.4 | GHSA-mj9p-v2r8-wf8w |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| simplesamlphp | SimpleSAMLphp | >= 1.18.0, < 1.18.4 |
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N
References
- https://github.com/simplesamlphp/simplesamlphp/security/advisories/GHSA-mj9p-v2r8-wf8w x_refsource_CONFIRM
- https://simplesamlphp.org/security/202001-01 x_refsource_MISC