CVE-2023-46735 — Symfony is a PHP framework for web and console applications and a set of reusabl

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 do

01What is this vulnerability?

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.

02Affected products

Vendor	Product	Versions
symfony	symfony	>= 6.3.0, < 6.3.8

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-11-10T17:58:18.136Z
• Last modified: 2024-09-03T15:24:36.945Z

09References

• github.com — https://github.com/symfony/symfony/security/advisories/GHSA-72x2-5c85-6wmr
• github.com — https://github.com/symfony/symfony/commit/8128c302430394f639e818a7103b3f6815d8d9…