Skip to content

Symfony potential Cross-site Scripting vulnerabilities in CodeExtension filters

Moderate severity GitHub Reviewed Published Nov 10, 2023 in symfony/symfony • Updated Dec 3, 2023

Package

composer symfony/symfony (Composer)

Affected versions

>= 2.0.0, < 4.4.51
>= 5.0.0, < 5.4.31
>= 6.0.0, < 6.3.8

Patched versions

4.4.51
5.4.31
6.3.8
composer symfony/twig-bridge (Composer)
>= 2.0.0, < 4.4.51
>= 5.0.0, < 5.4.31
>= 6.0.0, < 6.3.8
4.4.51
5.4.31
6.3.8

Description

Description

Some Twig filters in CodeExtension use "is_safe=html" but don't actually ensure their input is safe.

Resolution

Symfony now escapes the output of the affected filters.

The patch for this issue is available here for branch 4.4.

Credits

We would like to thank Pierre Rudloff for reporting the issue and to Nicolas Grekas for providing the fix.

References

@nicolas-grekas nicolas-grekas published to symfony/symfony Nov 10, 2023
Published by the National Vulnerability Database Nov 10, 2023
Published to the GitHub Advisory Database Nov 12, 2023
Reviewed Nov 12, 2023
Last updated Dec 3, 2023

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

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(76th percentile)

Weaknesses

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Learn more on MITRE.

CVE ID

CVE-2023-46734

GHSA ID

GHSA-q847-2q57-wmr3

Source code

Credits

Loading Checking history
See something to contribute? Suggest improvements for this vulnerability.