Description
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 6.4.40, 7.4.12, and 8.0.12, the Mailjet mailer bridge and LOX24 notifier bridge webhook parsers received configured webhook secrets but did not verify them, allowing unauthenticated POST requests to inject forged Mailjet and LOX24 event payloads. This issue is fixed in versions 6.4.40, 7.4.12, and 8.0.12.
Affected products
sensiolabs: symfony
References6
- github.com/symfony/symfony/security/advisories/GHSA-64hg-93w9-f… PatchVendor Advisory
- github.com/symfony/symfony/commit/3e52bf5ab733ee32e35eeeeb2631d… Patch
- github.com/symfony/symfony/commit/4aaa45dd054f73445f1ab254968b7… Patch
- github.com/symfony/symfony/releases/tag/v6.4.40 Release Notes
- github.com/symfony/symfony/releases/tag/v7.4.12 Release Notes
- github.com/symfony/symfony/releases/tag/v8.0.12 Release Notes
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N - CVSS 4.0
-
6.9
MEDIUM
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 39 · as of 15 November 2026
- CWE
- CWE-287CWE-306
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.