# CVE-2025-63828: Backdrop CMS Host Header Injection vulnerability

Source: https://junglewise.ai/threats/cve-2025-63828-backdrop-cms-host-header-injection-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-11-18  
License: CC BY 4.0 with a link back

CVE-2025-63828 · Severity: medium · CVSS 6.1 · Published 2025-11-18

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.

Technologies: [backdrop/backdrop (Packagist)](https://junglewise.ai/threats/technologies/backdrop-backdrop). Vendors: [Packagist](https://junglewise.ai/threats/vendors/packagist).

## Quick answers

**Is CVE-2025-63828 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-63828 being exploited in the wild.

**How severe is CVE-2025-63828?** Medium severity, with a CVSS score of 6.1, published 18 November 2025.

**Which products and versions are affected?** backdrop/backdrop (Packagist) ECOSYSTEM:introduced=0,last_affected=1.32.0.

**Is there a fix for CVE-2025-63828?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-63828?** Check whether you run Backdropcms Backdrop Cms or backdrop/backdrop (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Backdropcms Backdrop Cms
- backdrop/backdrop (Packagist) ECOSYSTEM:introduced=0,last_affected=1.32.0

## Identifiers

- CVE-2025-63828
- GHSA-ffpg-gm3h-4p5p

## Related threats

- [Backdrop CMS does not sufficiently sanitize field labels before they are displayed in certain places](https://junglewise.ai/threats/cve-2024-41709-backdrop-cms-does-not-sufficiently-sanitize-field-labels-before)
- [Cross-site Scripting in Backdrop CMS](https://junglewise.ai/threats/cve-2023-31045-cross-site-scripting-in-backdrop-cms)
- [Cross-site Scripting in Backdrop CMS](https://junglewise.ai/threats/cve-2022-42095-cross-site-scripting-in-backdrop-cms)
- [Cross-site Scripting in Backdrop CMS](https://junglewise.ai/threats/cve-2022-42097-cross-site-scripting-in-backdrop-cms)
- [Cross-site Scripting in Backdrop CMS](https://junglewise.ai/threats/cve-2022-42094-cross-site-scripting-in-backdrop-cms)