Backdrop CMS Host Header Injection vulnerability
Host Header Injection vulnerability in Backdrop CMS 1.32.1 allows attackers to manipulate the Host header in password reset requests, leading to redirects to malicious domains and potential session hijacking via cookie injection.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | backdrop/backdrop | <= 1.32.0 | no fix |
References
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N/E:P- Weakness (CWE)
CWE-601, CWE-644- Platform
- Composer
- Package
backdrop/backdrop- Disclosed
- 18.11.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-ffpg-gm3h-4p5p - CC BY 4.0
Vulnerability history: backdrop/backdrop
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 8
- First → latest
- 10.2022 11.2025
- Without a fix
- 6
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 7
Disclosures per year
- 2022: 5
- 2023: 1
- 2024: 1
- 2025: 1
- 2026: 0
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Backdrop CMS Host Header Injection vulnerability this entry
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