How severe is CVE-2016-10735?

CVE-2016-10735 has a CVSS score of 6.1/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2016-10735?

CVE-2016-10735 affects the following packages: org.webjars:bootstrap (Maven), org.webjars:bootstrap (Maven), bootstrap (npm), bootstrap (npm), bootstrap-sass (npm), bootstrap (NuGet), bootstrap (NuGet), bootstrap.sass (NuGet), and 4 more. Ecosystems affected: Maven, npm, NuGet, Packagist, RubyGems.

How do I fix CVE-2016-10735?

Update org.webjars:bootstrap to 3.4.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2016-10735 is resolved across your whole dependency graph.

How do I detect CVE-2016-10735 in my Maven, npm, NuGet, Packagist, RubyGems dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.webjars:bootstrap, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2016-10735 if there is no patch (or I can't update yet)?

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.

Is CVE-2016-10735 actively exploited in the wild?

Yes. There are 2 known exploit references for CVE-2016-10735, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2016-10735?

CVE-2016-10735 has an EPSS (Exploit Prediction Scoring System) score of 4.0%, placing it in the 91th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2016-10735?

CVE-2016-10735 is classified as Cross-site Scripting (XSS) (CWE-79). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2016-10735 published, and has it been updated?

CVE-2016-10735 was published on January 9, 2019 and was last updated on October 20, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

☕

☕ Maven📦 npm.NET NuGet🐘 Packagist💎 RubyGems

Not in CISA KEV

MEDIUM severity

CVE-2016-10735 — bootstrap

MEDIUMFix: twbs/bootstrap#23687

CVE-2016-10735 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in org.webjars:bootstrap. 2 public exploit or proof-of-concept references are indexed, so weaponization risk is real. A fix is available for org.webjars:bootstrap — see the affected versions and patch details below.

Bootstrap Cross-site Scripting vulnerability

Also known asGHSA-4p24-vmcr-4gqj

Published

Jan 9, 2019

Updated

Oct 20, 2026

Affected

12 pkgs

Patched

12 / 12

Exploits

2 known

Exploitation data as of Nov 3, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

4.0%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs91th percentile — riskier than 91% of all scored CVEsHighest risk

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

12 pkgs affected

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.

15Kother npm packages depend on this — each one inherits the vulnerability until it's patched upstream

bootstrapnpm

8.3Mdownloads / week

Description

In Bootstrap 2.x from 2.0.4, 3.x before 3.4.0 and 4.x-beta before 4.0.0-beta.2, XSS is possible in the data-target attribute. Note that this is a different vulnerability than CVE-2018-14041.

See https://blog.getbootstrap.com/2018/12/13/bootstrap-3-4-0/ for more info.

Affected Packages

12 total 12 fixed

Ecosystem	Package	Vulnerable range	Fix
☕Maven	`org.webjars:bootstrap`	≥ 2.0.4&&< 3.4.0	3.4.0`org.webjars:bootstrap:3.4.0`
☕Maven	`org.webjars:bootstrap`	≥ 4.0.0-beta&&< 4.0.0-beta.2	4.0.0-beta.2`org.webjars:bootstrap:4.0.0-beta.2`
📦npm	`bootstrap`	≥ 2.0.4&&< 3.4.0	3.4.0`npm install bootstrap@3.4.0`
📦npm	`bootstrap`	≥ 4.0.0-beta&&< 4.0.0-beta.2	4.0.0-beta.2`npm install bootstrap@4.0.0-beta.2`
📦npm	`bootstrap-sass`	≥ 2.0.4&&< 3.4.0	3.4.0`npm install bootstrap-sass@3.4.0`
.NETNuGet	`bootstrap`	≥ 2.0.4&&< 3.4.0	3.4.0`dotnet add package bootstrap --version 3.4.0`

Affected Products

1 product · 2 configurations

Application

bootstrapgetbootstrap

≥ 3.0.0 && < 3.4.0

1 version

4.0.0

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

In Bootstrap 3.x before 3.4.0 and 4.x-beta before 4.0.0-beta.2, XSS is p…

github.comNVDJul 2021

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.webjars:bootstrap, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update org.webjars:bootstrap to 3.4.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2016-10735 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.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

Red Hat Enterprise Satellite 5 is now in Maintenance Support 2 phase of the support and maintenance life cycle. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Satellite 5 Life Cycle: https://access.redhat.com/support/policy/updates/satellite. Red…

Product	Fixed in	Advisory
CloudForms Management Engine 5.11	`ansible-runner-0:1.3.4-2.el8ar`	RHBA-2019:4199
Red Hat Decision Manager 7	`bootstrap`	RHSA-2020:0133
Red Hat Enterprise Linux 7	`ipa-0:4.6.8-5.el7`	RHSA-2020:3936
Red Hat Enterprise Linux 8	`idm:client-8030020200923172426.05ac3f11`	RHSA-2020:4670
Red Hat Enterprise Linux 8	`pki-core:10.6-8030020200911215836.5ff1562f`	RHSA-2020:4847
Red Hat JBoss Enterprise Application Platform 7.4.9	`org.jboss.hal/hal-console:3.3.16.Final-redhat-00001`	RHSA-2023:0556
Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 8	`eap7-hal-console-0:3.3.16-1.Final_redhat_00001.1.el8eap`	RHSA-2023:0553
Red Hat JBoss Enterprise Application Platform 7.4 for RHEL 9	`eap7-hal-console-0:3.3.16-1.Final_redhat_00001.1.el9eap`	RHSA-2023:0554

Frequently Asked Questions

In Bootstrap 2.x from 2.0.4, 3.x before 3.4.0 and 4.x-beta before 4.0.0-beta.2, XSS is possible in the data-target attribute. Note that this is a different vulnerability than CVE-2018-14041. See https://blog.getbootstrap.com/2018/12/13/bootstrap-3-4-0/ for more info.

O3 Security · Impact-Aware SCA

Is CVE-2016-10735 in your dependencies?

Find it across Maven, npm, NuGet, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

6.1/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Raw vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CWE Classification

CWE-79Cross-site Scripting (XSS)

Weaponization

No Nuclei template or Metasploit module yet. 2 public proof-of-concept references are listed on this page.

OpenSSF Scorecard

Package health score

bootstrap

7.2/10

Dependency-Update-Tool10/10

Code-Review0/10

Maintained10/10

Vulnerabilities6/10

Branch-Protection8/10

Assessed Nov 2, 2026

Timeline

Disclosed

Jan 9, 2019

First exploit

Jul 22, 2021

Last updated

Oct 20, 2026

Identifiers

CVE-2016-10735

GHSA-4p24-vmcr-4gqj

Related vulnerabilities

Also affects bootstrap

This CVE is medium severity, in line with the other 6 CVEs affecting bootstrap.

CVE-2018-14040CVE-2019-8331CVE-2018-20676CVE-2018-20677CVE-2018-14042CVE-2018-14041

Also affects bootstrap

This CVE is medium severity, in line with the other 2 CVEs affecting bootstrap.

CVE-2025-1647CVE-2024-6485

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 20, 2026