HTTP Header Injection Affecting backdrop/backdrop package, versions >=0.0.0
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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Test your applications- Snyk IDSNYK-PHP-BACKDROPBACKDROP-14054478
- published19 Nov 2025
- disclosed18 Nov 2025
- creditmertdurum06
Introduced: 18 Nov 2025
NewCVE-2025-63828 (opens in a new tab)How to fix?
There is no fixed version for backdrop/backdrop.
Overview
backdrop/backdrop is a CMS that helps you build websites for businesses and non-profits.
Affected versions of this package are vulnerable to HTTP Header Injection via manipulation of the Host header in password reset requests. An attacker can cause users to be redirected to malicious domains and potentially hijack sessions by injecting cookies through crafted requests.