Bootstrap Multiselect Vulnerable to CSRF and Reflective XSS via Arbitrary POST DataGHSA-gv5r-9gxr-v74w
MEDIUMFix: davidstutz/bootstrap-multiselect#1287GHSA-gv5r-9gxr-v74w is a medium-severity (CVSS 6.1) Cross-Site Request Forgery (CSRF) vulnerability in bootstrap-multiselect. A fix is available for bootstrap-multiselect — see the affected versions and patch details below.
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for GHSA-gv5r-9gxr-v74w.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
bootstrap-multiselectnpmDescription
An issue was discovered in post.php in bootstrap-multiselect (aka Bootstrap Multiselect) 1.1.2. A PHP script in the source code echoes arbitrary POST data. If a developer adopts this structure wholesale in a live application, it could create a Reflective Cross-Site Scripting (XSS) vulnerability exploitable through Cross-Site Request Forgery (CSRF).
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | bootstrap-multiselect | all versions | 2.0.0npm install bootstrap-multiselect@2.0.0 |
Affected Products
bootstrap multiselectdavidstutzDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for bootstrap-multiselect, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update bootstrap-multiselect to 2.0.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-gv5r-9gxr-v74w is resolved across your whole dependency graph.
Workarounds
Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page.
How to detect GHSA-gv5r-9gxr-v74w
A community-maintained Nuclei template exists for this CVE. You can scan for it directly:
nuclei -id ghsa-gv5r-9gxr-v74w -u https://target- Template
- Bootstrap Multiselect <= 1.1.2 - Cross-Site Scripting
- Severity
- medium
- Impact
- Successful exploitation of this vulnerability could allow an attacker to execute malicious scripts in the context of the victim's browser, leading to potential data theft, session hijacking, or defacement of the affected application.
- Remediation
- Only use the necessary components (css/js) in production applications
Template by ProjectDiscovery nuclei-templates (r3naissance), MIT licensed. View the full template. Scan only systems you are authorised to test.
Frequently Asked Questions
Is GHSA-gv5r-9gxr-v74w in your dependencies?
Find it across npm, including transitive dependencies.