Cross-site scripting in SimpleSAMLphp
CVE-2020-5226

4.4MEDIUM

Key Information:

Vendor

SimplesamlPHP

Status
SimplesamlPHP
Vendor
CVE Published:
24 January 2020

What is CVE-2020-5226?

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 Version(s)

SimpleSAMLphp >= 1.18.0, < 1.18.4

References

https://github.com/simplesamlphp/simplesamlphp/security/a...
x_refsource_CONFIRM
https://simplesamlphp.org/security/202001-01
x_refsource_MISC

CVSS V3.1

Score:
4.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.