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PHP Code Injection by malicious function name in smarty

Critical severity GitHub Reviewed Published Feb 21, 2021 in smarty-php/smarty • Updated Feb 7, 2024

Package

composer smarty/smarty (Composer)

Affected versions

< 3.1.39

Patched versions

3.1.39

Description

Template authors could inject php code by choosing a malicous {function} name. Sites that cannot fully trust template authors should update as soon as possible. Please upgrade to 3.1.39 or higher.

References

@wisskid wisskid published to smarty-php/smarty Feb 21, 2021
Published by the National Vulnerability Database Feb 22, 2021
Reviewed Feb 26, 2021
Published to the GitHub Advisory Database Feb 26, 2021
Last updated Feb 7, 2024

Severity

Critical

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
High
Availability
High

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:H/A:H

EPSS score

1.363%
(87th percentile)

Weaknesses

CVE ID

CVE-2021-26120

GHSA ID

GHSA-3rpf-5rqv-689q

Source code

Credits

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