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Zend_Filter_StripTags vulnerable to Cross-site Scripting when comments allowed

Moderate severity GitHub Reviewed Published Jun 7, 2024 to the GitHub Advisory Database • Updated Jun 7, 2024

Package

composer zendframework/zendframework1 (Composer)

Affected versions

>= 1.7.0, < 1.7.9
>= 1.8.0, < 1.8.5
>= 1.9.0, < 1.9.7

Patched versions

1.7.9
1.8.5
1.9.7

Description

Zend_Filter_StripTags contained an optional setting to allow whitelisting HTML comments in filtered text. Microsoft Internet Explorer and several other browsers allow developers to create conditional functionality via HTML comments, including execution of script events and rendering of additional commented markup. By allowing whitelisting of HTML comments, a malicious user could potentially include XSS exploits within HTML comments that would then be rendered in the final output.

References

Published to the GitHub Advisory Database Jun 7, 2024
Reviewed Jun 7, 2024
Last updated Jun 7, 2024

Severity

Moderate

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
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
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:R/S:C/C:L/I:L/A:N

Weaknesses

CVE ID

No known CVE

GHSA ID

GHSA-4vf6-mq7w-3hp6

Source code

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