Missing Authentication for Critical Function Affecting symfony/lox24-notifier package, versions >=6.4, <6.4.40>=7.0, <7.4.12>=8.0, <8.0.12
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published24 May 2026
- disclosed20 May 2026
- creditHimanshu Anand
Introduced: 20 May 2026
CVE-2026-45754 (opens in a new tab)How to fix?
Upgrade symfony/lox24-notifier to version 6.4.40, 7.4.12, 8.0.12 or higher.
Overview
symfony/lox24-notifier is a Symfony LOX24 Notifier Bridge
Affected versions of this package are vulnerable to Missing Authentication for Critical Function via the doParse() webhook request parsers in the Mailjet maile bridge and LOX24 SMS notifier bridge. An attacker can submit forged webhook events because the configured webhook secret is accepted but never validated, allowing unauthenticated POST requests to be processed as legitimate provider callbacks.
This can lead to falsified bounce, spam, open, click, or delivery events, resulting in suppression-list corruption and delivery-metrics manipulation.