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SEOmatic for CraftCMS allows Server-Side Template Injection

High severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Aug 21, 2023

Package

composer nystudio107/craft-seomatic (Composer)

Affected versions

< 3.2.49

Patched versions

3.2.49

Description

In the SEOmatic plugin before 3.2.49 for Craft CMS, helpers/DynamicMeta.php does not properly sanitize the URL. This leads to Server-Side Template Injection and credentials disclosure via a crafted Twig template after a semicolon.

References

Published by the National Vulnerability Database May 11, 2020
Published to the GitHub Advisory Database May 24, 2022
Reviewed Jul 13, 2023
Last updated Aug 21, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS score

0.282%
(69th percentile)

Weaknesses

CVE ID

CVE-2020-12790

GHSA ID

GHSA-23q7-59jj-2pj4

Source code

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