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CVE-2023-46735

Symfony potential Cross-site Scripting in WebhookController

6.1 MediumFix available

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Starting in version 6.0.0 and prior to version 6.3.8, the error message in WebhookController returns unescaped user-submitted input. As of version 6.3.8, WebhookController now doesn't return any user-submitted input in its response.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
None

Exploit likelihood

0.57%Up 0.5 points since Nov 11, 2023
90%50%10%1%

What each source reports

CVE List Score used 6.1

Symfony potential Cross-site Scripting in WebhookController

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Starting in version 6.0.0 and prior to version 6.3.8, the error message in WebhookController returns unescaped user-submitted input. As of version 6.3.8, WebhookController now doesn't return any user-submitted input in its response.

Record
CVE-2023-46735
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
EUVDEUVD-2023-2904 6.1

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Starting in version 6.0.0 and prior to version 6.3.8, the error message in WebhookController returns unescaped user-submitted input. As of version 6.3.8, WebhookController now doesn't return any user-submitted input in its response.

Record
EUVD-2023-2904
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-72x2-5c85-6wmr 5.3

Symfony potential Cross-site Scripting in WebhookController

Description

The error message in WebhookController returns unescaped user-submitted input.

Resolution

WebhookController now doesn't return any user-submitted input in its response.

The patch for this issue is available here for branch 6.3.

Credits

We would like to thank Maxime Aknin for reporting the issue and to Nicolas Grekas for providing the fix.

Record
GHSA-72x2-5c85-6wmr
CVSS 4.0
5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
NVD 6.1

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Starting in version 6.0.0 and prior to version 6.3.8, the error message in WebhookController returns unescaped user-submitted input. As of version 6.3.8, WebhookController now doesn't return any user-submitted input in its response.

Record
CVE-2023-46735
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSV 6.1

Symfony potential Cross-site Scripting in WebhookController

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Starting in version 6.0.0 and prior to version 6.3.8, the error message in WebhookController returns unescaped user-submitted input. As of version 6.3.8, WebhookController now doesn't return any user-submitted input in its response.

Record
CVE-2023-46735
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSVGHSA-72x2-5c85-6wmr 5.3

Symfony potential Cross-site Scripting in WebhookController

Description

The error message in WebhookController returns unescaped user-submitted input.

Resolution

WebhookController now doesn't return any user-submitted input in its response.

The patch for this issue is available here for branch 6.3.

Credits

We would like to thank Maxime Aknin for reporting the issue and to Nicolas Grekas for providing the fix.

Record
GHSA-72x2-5c85-6wmr
CVSS 4.0
5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS 3.1
6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSVBIT-symfony-2023-46735 No score

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Starting in version 6.0.0 and prior to version 6.3.8, the error message in WebhookController returns unescaped user-submitted input. As of version 6.3.8, WebhookController now doesn't return any user-submitted input in its response.

Record
BIT-symfony-2023-46735
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
symfony/webhook
Packagist
 6.3.0 up to 6.3.8
6.3.8
symfony/symfony
Packagist
 6.3.0 up to 6.3.8
6.3.8
symfony
Bitnami
 6.0.0 up to 6.3.8
6.3.8
symfony/webhook
Packagist
 6.3.0 up to 6.3.8, plus listed versions
v6.3.0
6.3.8
symfony/symfony
Packagist
 6.3.0 up to 6.3.8, plus listed versions
v6.3.0v6.3.1v6.3.2v6.3.3v6.3.4v6.3.5v6.3.6v6.3.7
6.3.8

History

History
RecordedChangedSources
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-46735 is a medium vulnerability (CVSS 6.1) in Sensiolabs Symfony, published November 10, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.57%, the 47th percentile. Fixed in symfony/webhook 6.3.8.

References

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