How to fix CVE-2025-27825?

Within 30 days: Identify affected systems running the Bootstrap 5 Lite theme and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

CVE-2025-27825

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2025-03-07 [email protected]

XSS

6.4

CVSS 3.1

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:30 vuln.today

CVE Published

Mar 07, 2025 - 22:15 nvd

MEDIUM 6.4

DescriptionNVD

An XSS issue was discovered in the Bootstrap 5 Lite theme before 1.x-1.0.3 for Backdrop CMS. It doesn't sufficiently sanitize certain class names.

AnalysisAI

An XSS issue was discovered in the Bootstrap 5 Lite theme before 1.x-1.0.3 for Backdrop CMS. Rated medium severity (CVSS 6.4), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. An XSS issue was discovered in the Bootstrap 5 Lite theme before 1.x-1.0.3 for Backdrop CMS. It doesn't sufficiently sanitize certain class names. Version information: before 1..

Affected ProductsAI

See vendor advisory for affected versions.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

CVE-2025-27825 vulnerability details – vuln.today

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