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CVE-2023-46734

Symfony potential Cross-site Scripting vulnerabilities in CodeExtension filters

MEDIUM
6.1
CVSS Score
Published: November 10, 2023 at 05:49 PM UTC
Updated: July 29, 2026 at 06:53 PM UTC
4 products affected across 3 vendorsDebian LinuxSymfonyTwig Bridge

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.7%
SSVC
No known exploit

Description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Starting in versions 2.0.0, 5.0.0, and 6.0.0 and prior to versions 4.4.51, 5.4.31, and 6.3.8, some Twig filters in CodeExtension use `is_safe=html` but don't actually ensure their input is safe. As of versions 4.4.51, 5.4.31, and 6.3.8, Symfony now escapes the output of the affected filters.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
10.0
Symfony· Sensiolabsdrupal
95%
2.0.0 ≤ v < 4.4.515.0.0 ≤ v < 5.4.316.0.0 ≤ v < 6.3.8
Affected range stops below 4.4.51, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.4.31, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.3.8, so it looks safe — our inference, not a vendor statement
Twig Bridge· Symfony
95%
2.0.0 ≤ v < 4.4.515.0.0 ≤ v < 5.4.316.0.0 ≤ v < 6.3.8
Affected range stops below 4.4.51, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.4.31, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.3.8, so it looks safe — our inference, not a vendor statement
Symfony· Symfonycomposer
60%
v < 4.4.51v < 5.4.31v < 6.3.8
Affected range stops below 4.4.51, so it looks safe — our inference, not a vendor statement
Affected range stops below 5.4.31, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.3.8, so it looks safe — our inference, not a vendor statement

References (4)

x_refsource_MISCPatch
Source: [email protected]
https://github.com/symfony/symfony/commit/5d095d5feb1322b16450284a04d6bb48d1198f54
x_refsource_MISCPatch
Source: [email protected]
https://github.com/symfony/symfony/commit/9da9a145ce57e4585031ad4bee37c497353eec7c
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://github.com/symfony/symfony/security/advisories/GHSA-q847-2q57-wmr3
Mailing List
Source: [email protected]
https://lists.debian.org/debian-lts-announce/2023/11/msg00019.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

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