What is the CVSS score of CVE-2025-63828?

CVE-2025-63828 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.1%.

Which versions of Open Redirect are affected by CVE-2025-63828?

Organizations using Host Header Injection vulnerability in Backdrop CMS 1.32.1 should be aware of moderate risk from CVE-2025-63828 rated CVSS 6.1.

Is there a public PoC exploit available for CVE-2025-63828?

Yes, a public proof-of-concept exploit is available for CVE-2025-63828. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-63828?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Open Redirect CVE-2025-63828

MEDIUM

URL Redirection to Untrusted Site (Open Redirect) (CWE-601)

2025-11-18 cve@mitre.org

Open Redirect Backdrop Cms

6.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:22 vuln.today

PoC Detected

Nov 24, 2025 - 14:02 vuln.today

Public exploit code

CVE Published

Nov 18, 2025 - 18:16 nvd

MEDIUM 6.1

DescriptionCVE.org

AnalysisAI

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. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Open Redirect (CWE-601), which allows attackers to redirect users to malicious websites via URL manipulation. 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 products include: Backdropcms Backdrop Cms.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate redirect destinations against an allowlist, avoid using user input in redirect URLs.

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