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.

Severity

 

CVSS Version 3.x CVSS Version 2.0

CVSS 3.x Severity and Metrics:

NIST: NVD

Base Score:  5.4 MEDIUM

Vector:  CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

CNA:  GitHub, Inc.

Base Score:  4.4 MEDIUM

Vector:  CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:N

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: It is possible that the NVD CVSS may not match that of the CNA. The most common reason for this is that publicly available information does not provide sufficient detail or that information simply was not available at the time the CVSS vector string was assigned.

CVSS 2.0 Severity and Metrics:

NIST: NVD

Base Score:  3.5 LOW

Vector:  (AV:N/AC:M/Au:S/C:N/I:P/A:N)

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to nvd@nist.gov.

Hyperlink	Resource
https://github.com/simplesamlphp/simplesamlphp/security/advisories/GHSA-mj9p-v2r8-wf8w	Third Party Advisory
https://simplesamlphp.org/security/202001-01	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	NIST   GitHub, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Denotes Vulnerable Software
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Change History

1 change records found show changes

Initial Analysis by NIST 1/30/2020 2:45:19 PM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR *cpe:2.3:a:simplesamlphp:simplesamlphp:*:*:*:*:*:*:*:* versions up to (excluding) 1.18.4
Added	CVSS V2		NIST (AV:N/AC:M/Au:S/C:N/I:P/A:N)
Added	CVSS V2 Metadata		Victim must voluntarily interact with attack mechanism
Added	CVSS V3.1		NIST AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Added	CWE		NIST CWE-79
Changed	Reference Type	https://github.com/simplesamlphp/simplesamlphp/security/advisories/GHSA-mj9p-v2r8-wf8w No Types Assigned	https://github.com/simplesamlphp/simplesamlphp/security/advisories/GHSA-mj9p-v2r8-wf8w Third Party Advisory
Changed	Reference Type	https://simplesamlphp.org/security/202001-01 No Types Assigned	https://simplesamlphp.org/security/202001-01 Vendor Advisory