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Vulnerability Database · npm · Package report

bootstrap: vulnerability history, versions and safety

bootstrap is a package in the npm ecosystem. Vulert records 9 vulnerabilities for it across 69 releases, from Sep 2018 to May 2025. Each vulnerability names the versions it affects, the fixed version to move to, and a workaround where no fix has been published.

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9 vulnerabilities recorded M9
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2 with no fix published

No patched version yet — these are the ones to plan around.

See the unfixed vulnerabilities →
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0 in the last 12 months

Nothing new recorded in the last year.

See the disclosure history →
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0 malicious-package vulnerabilities

No published version shipped hostile code.

See all bootstrap vulnerabilities

Vulert verdict on bootstrap 5.3.8 i

Updated on 22 Oct 2026

Careful: 5.3.8 has 2 known vulnerabilities, and 2 have no fix yet. Use an earlier safe version, or the workaround listed for each one.

Package health score 60/100
  • Security Minor issues
  • Maintenance Maintaining
  • Popularity Key ecosystem project
  • Community Active

The current release has a vulnerability with no published fix, which caps this score.

What to do: Pin an earlier, unaffected release if you can, and apply the workaround each vulnerability lists until a fix is published. No fix yet: Vulert alerts you the moment one is published. Monitor it with Vulert →

  • Current release 5.3.8 — affected i
  • Vulnerabilities on record 9 over 6 years · 0 in the last year i
  • Latest disclosure 15 May 2025 i
  • Highest CVSS 6.4 i
  • With no published fix 2 i
  • Depended on by 22,970 packages i
  • Stars 174,997 i
  • OpenSSF scorecard 7/10 i
  • Last release 13 months ago i
  • Licence MIT i

Version list, release dates, licence and dependants published by the npm registry, refreshed 23 Oct 2026. Licence information is not legal advice.

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01 Versions

Which versions are affected

Every version Vulert tracks for bootstrap, newest first, with the vulnerabilities recorded against each one. A version showing none has no vulnerability in the Vulert database — open it for the full picture on that release.

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Version Released Vulert vulnerabilities Licence Fix published Details
6.0.0-alpha.1 08 Oct 2026 M2 MIT No Details →
5.3.8 26 Aug 2025 M2 MIT No Details →
5.3.7 17 Jun 2025 M2 MIT No Details →
5.3.6 05 May 2025 M2 MIT No Details →
5.3.5 04 Apr 2025 M2 MIT No Details →
5.3.4 03 Apr 2025 M2 MIT No Details →
5.3.3 20 Feb 2024 M2 MIT No Details →
5.3.2 14 Sep 2023 M2 MIT No Details →
5.3.1 26 Jul 2023 M2 MIT No Details →
5.3.0 30 May 2023 M2 MIT No Details →
5.3.0-alpha3 03 Apr 2023 M2 MIT No Details →
5.3.0-alpha2 24 Mar 2023 M2 MIT No Details →
5.3.0-alpha1 24 Dec 2022 M2 MIT No Details →
5.2.3 22 Nov 2022 M2 MIT No Details →
5.2.2 03 Oct 2022 M2 MIT No Details →
5.2.1 07 Sep 2022 M2 MIT No Details →
5.2.0 19 Jul 2022 M2 MIT No Details →
4.6.2 19 Jul 2022 M3 MIT No Details →
5.2.0-beta1 13 May 2022 M2 MIT No Details →
4.6.1 28 Oct 2021 M3 MIT No Details →
5.1.3 09 Oct 2021 M2 MIT No Details →
5.1.2 05 Oct 2021 M2 MIT No Details →
5.1.1 07 Sep 2021 M2 MIT No Details →
5.1.0 04 Aug 2021 M2 MIT No Details →
5.0.2 22 Jun 2021 M2 MIT No Details →
5.0.1 13 May 2021 M2 MIT No Details →
5.0.0 05 May 2021 M2 MIT No Details →
5.0.0-beta3 23 Mar 2021 M3 MIT No Details →
5.0.0-beta2 10 Feb 2021 M3 MIT No Details →
4.6.0 19 Jan 2021 M3 MIT No Details →
5.0.0-beta1 07 Dec 2020 M3 MIT No Details →
5.0.0-alpha3 11 Nov 2020 M3 MIT No Details →
4.5.3 13 Oct 2020 M3 MIT No Details →
5.0.0-alpha2 29 Sep 2020 M3 MIT No Details →
4.5.2 06 Aug 2020 M3 MIT No Details →
4.5.1 04 Aug 2020 M3 MIT No Details →
5.0.0-alpha1 16 Jun 2020 M3 MIT No Details →
4.5.0 12 May 2020 M3 MIT No Details →
4.4.1 28 Nov 2019 M3 MIT No Details →
4.4.0 26 Nov 2019 M3 MIT No Details →
4.3.1 13 Feb 2019 M3 MIT No Details →
3.4.1 13 Feb 2019 M1 MIT No Details →
4.3.0 11 Feb 2019 M3 MIT No Details →
4.2.1 21 Dec 2018 M3 MIT No Details →
3.4.0 13 Dec 2018 M3 MIT No Details →
4.1.3 24 Jul 2018 M3 MIT No Details →
4.1.2 12 Jul 2018 M3 MIT No Details →
4.1.1 30 Apr 2018 M5 MIT No Details →
4.1.0 09 Apr 2018 M5 MIT No Details →
4.0.0 18 Jan 2018 M5 MIT No Details →
4.0.0-beta.3 28 Dec 2017 M2 MIT No Details →
4.0.0-beta.2 19 Oct 2017 M2 MIT No Details →
4.0.0-beta 11 Aug 2017 M2 MIT No Details →
4.0.0-alpha.6 06 Jan 2017 M2 MIT No Details →
4.0.0-alpha.5 19 Oct 2016 M2 MIT No Details →
4.0.0-alpha.4 05 Sep 2016 M2 MIT No Details →
4.0.0-alpha.3 27 Jul 2016 M2 MIT No Details →
3.3.7 25 Jul 2016 M6 MIT No Details →
4.0.0-alpha.2 09 Dec 2015 M2 MIT No Details →
3.3.6 24 Nov 2015 M6 MIT No Details →
3.3.5 16 Jun 2015 M6 MIT No Details →
3.3.4 16 Mar 2015 M6 MIT No Details →
3.3.2 19 Jan 2015 M6 MIT No Details →
3.3.1 12 Nov 2014 M6 MIT No Details →
3.3.0 29 Oct 2014 M6 MIT No Details →
3.2.0 26 Jun 2014 M6 MIT No Details →
3.1.1 09 Jun 2014 M6 MIT No Details →
0.0.2 28 Aug 2011 M3 MIT No Details →
0.0.1 28 Aug 2011 M3 MIT No Details →

All 69 versions Vulert tracks for this package. Severity counts are the vulnerabilities recorded against that exact release.

02 Disclosure history

How often vulnerabilities are recorded

  • 2018 1
  • 2019 3
  • 2022 1
  • 2024 3
  • 2025 1

Counted by the year Vulert recorded each vulnerability — the same date the table below shows as disclosed. 0 of the 9 were recorded in the last 12 months.

03 Vulnerabilities

Recorded vulnerabilities for bootstrap

The 5 most severe of 9 vulnerabilities recorded for this package

Search all 9 in the database →
Vulnerability Severity Fixed version ↓ Disclosed ↓
CVE-2024-6531: Bootstrap Cross-Site Scripting (XSS) Vulnerability 6.4 medium 5.0.0 11 Jul 2024
CVE-2024-6484: Bootstrap Cross-Site Scripting (XSS) Vulnerability 6.4 medium No fix published 11 Jul 2024
CVE-2024-6485: Bootstrap Cross-Site Scripting (XSS) Vulnerability in Data Attributes 6.4 medium 3.4.1 11 Jul 2024
CVE-2018-20676: XSS vulnerability in Bootstrap 6.1 medium 3.4.0 17 Jan 2019
CVE-2016-10735: XSS vulnerability in bootstrap 6.1 medium 3.4.0 17 Jan 2019

Vulnerability wrong, a fix missing, or a package we should cover? Report it and we will fix the record. Report Vulnerability Provide Feedback

Updated: 22/Oct/2026 · Vulnerabilities in our DB: 524173

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Questions

About bootstrap

Is bootstrap safe to use?

Vulert records 9 vulnerabilities for bootstrap in npm: 0 critical, 0 high, 9 medium and 0 low. 2 of them have no published fix yet, so those are the ones to avoid or mitigate.

What is bootstrap's Vulert package health score?

Vulert scores bootstrap 60/100, which reads as usable, but worth attention. The score weighs the vulnerability record (40), maintenance and release cadence (25), adoption from dependents and stars (20) and community signals such as the OpenSSF scorecard and forks (15). The current release has a vulnerability with no published fix, which caps this score.

Is the latest version of bootstrap affected?

Yes. 5.3.8, the version you would install today, has 2 known vulnerabilities, and 2 has no published fix yet. Use an earlier unaffected release, or the workaround each vulnerability lists.

Which version of bootstrap should I use?

5.3.8 is the version Vulert recommends for the affected releases. The version table above lists every release with the vulnerabilities recorded against it, so you can confirm the range you actually run.

How many vulnerabilities does bootstrap have?

9 vulnerabilities are recorded for bootstrap in the npm ecosystem: 0 critical, 0 high, 9 medium and 0 low. The ledger on this page lists the same counts next to the date of the most recent disclosure.

How often are new bootstrap vulnerabilities disclosed?

0 vulnerabilities were recorded for bootstrap in the last 12 months, and the oldest entry in this database dates to 13 Sep 2018. Recency matters more than a lifetime total: it shows how actively new issues are being disclosed for the package you are considering.

Which versions of bootstrap are affected?

Each vulnerability on this page lists the affected version range and the fixed version to move to. Open the vulnerability for the version you actually run — fixes are specific to a release line, not to the package as a whole.

How do I monitor bootstrap for upcoming vulnerabilities?

Upload the manifest or SBOM for your application at vulert.com/scanner and Vulert keeps checking the bootstrap version you actually run against new disclosures, then alerts you when one affects it. There is no installation and no source-code access required.