Answer in brief
CVE-2019-8331 records a Medium severity (CVSS 6.1) vulnerability in Bootstrap Vulnerable to Cross-Site Scripting. The current sources do not mark it as known exploited. The current feed maps org.webjars:bootstrap (maven), org.webjars:bootstrap (maven), bootstrap (npm), bootstrap (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps org.webjars:bootstrap (maven), org.webjars:bootstrap (maven), bootstrap (npm), bootstrap (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| org.webjars:bootstrapmaven | >=3.0.0 <3.4.1 | 3.4.1 |
| org.webjars:bootstrapmaven | >=4.0.0 <4.3.1 | 4.3.1 |
| bootstrapnpm | >=4.0.0 <4.3.1 | 4.3.1 |
| bootstrapnpm | >=3.0.0 <3.4.1 | 3.4.1 |
| bootstrap-sassnpm | >=3.0.0 <3.4.1 | 3.4.1 |
| bootstrapnuget | >=4.0.0 <4.3.1 | 4.3.1 |
| bootstrapnuget | >=3.0.0 <3.4.1 | 3.4.1 |
| Bootstrap.Lessnuget | >=3.0.0 <3.4.1 | 3.4.1 |
| bootstrap.sassnuget | >=0 <4.3.1 | 4.3.1 |
| twbs/bootstrappackagist | >=3.0.0 <3.4.1 | 3.4.1 |
| twbs/bootstrappackagist | >=4.0.0 <4.3.1 | 4.3.1 |
| bootstraprubygems | >=0 <4.3.1 | 4.3.1 |
| bootstrap-sassrubygems | >=3.0.0 <3.4.1 | 3.4.1 |
| twitter-bootstrap-railsrubygems | >=0 <5.3.0 | 5.3.0 |
Published upstream
Feb 22, 2019
Evidence: source:osv:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Aug 7, 2026
Versions of `bootstrap` prior to 3.4.1 for 3.x and 4.3.1 for 4.x are vulnerable to Cross-Site Scripting (XSS). The `data-template` attribute of the tooltip and popover plugins lacks input sanitization and may allow attacker to execute arbitrary JavaScript. ## Recommendation For `bootstrap` 4.x upgrade to 4.3.1 or later. For `bootstrap` 3.x upgrade to 3.4.1 or later.
Quoted source text, attributed separately from HOL analysis.