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CVE-2018-20677

23
FAUCET Score

CVE-2018-20677 describes a Cross-Site Scripting (XSS) vulnerability in Bootstrap versions prior to 3.4.0, specifically within the affix configuration's target property. This medium-severity vulnerability (CVSS 6.1) can be exploited remotely with low attack complexity, requiring user interaction, and could lead to limited confidentiality and integrity impacts. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.4.0CPE matchmatch criteria
cpe:2.3:a:getbootstrap:bootstrap:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.98%
Probability of exploitation in next 30 days
EPSS Percentile
89.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0398 is in the 95th percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (28)

composerpatch availablevia ghsa
Product: twbs/bootstrapFixed in: 3.4.0
github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: org.webjars:bootstrapFixed in: 3.4.0
npmpatch availablevia ghsa
Product: bootstrap-sassFixed in: 3.4.0
npmpatch availablevia ghsa
Product: bootstrapFixed in: 3.4.0
nugetpatch availablevia ghsa
Product: bootstrapFixed in: 3.4.0
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 13.0 (Queens) for RHEL 7.6 EUSFixed in: python-XStatic-Bootstrap-SCSS-0:3.4.1.0-1.el7ost
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Decision Manager 7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: ipa-0:4.6.8-5.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: idm:client-8030020200923172426.05ac3f11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: idm:DL1-8030020200923172343.9c827e52
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 13.0 (Queens)Fixed in: python-XStatic-Bootstrap-SCSS-0:3.4.1.0-1.el7ost
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Process Automation 7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Single Sign-On 7.3.2 zipFixed in: bootstrap
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization Engine 4.3Fixed in: ovirt-engine-api-explorer-0:0.0.4-1.el7ev
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization Engine 4.3Fixed in: ovirt-engine-api-explorer-0:0.0.5-1.el7ev
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Virtualization Engine 4.3Fixed in: ovirt-engine-ui-extensions-0:1.0.10-1.el7ev
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Ceph Storage 6.1Fixed in: ceph-2:17.2.6-148.el9cp
View patch
rubygemspatch availablevia ghsa
Product: bootstrapFixed in: 3.4.0
rubygemspatch availablevia ghsa
Product: bootstrap-sassFixed in: 3.4.0
redhatno patchvia redhat_api
Product: Red Hat Ceph Storage 5Fixed in: ceph
redhatno patchvia redhat_api
Product: Red Hat Decision Manager 7Fixed in: bootstrap
redhatno patchvia redhat_api
Product: Red Hat Process Automation 7Fixed in: bootstrap
redhatno patchvia redhat_api
Product: Red Hat OpenStack Platform 14 (Rocky)Fixed in: python-XStatic-Bootstrap-SCSS
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 10 (Newton)Fixed in: python-XStatic-Bootstrap-SCSS
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 8 (Liberty)Fixed in: python-XStatic-Bootstrap-SCSS
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 15 (Stein)Fixed in: python-XStatic-Bootstrap-SCSS
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 9 (Mitaka)Fixed in: python-XStatic-Bootstrap-SCSS

Vendor Advisories (2)

npmGHSA-ph58-4vrj-w6hrmedium

bootstrap Cross-site Scripting vulnerability

Jan 17, 2019
redhatCVE-2018-20677Moderate

bootstrap: XSS in the affix configuration target property

Aug 10, 2018

References

access.redhat.com / errata/RHBA-2019:1076
access.redhat.com / errata/RHBA-2019:1570
access.redhat.com / errata/RHSA-2019:1456
access.redhat.com / errata/RHSA-2019:3023
access.redhat.com / errata/RHSA-2020:0132
access.redhat.com / errata/RHSA-2020:0133
blog.getbootstrap.com / 2018/12/13/bootstrap-3-4-0
Release NotesVendor Advisory
github.com / twbs/bootstrap/issues/27045
ExploitIssue TrackingThird Party Advisory
github.com / twbs/bootstrap/issues/27915
Issue TrackingThird Party Advisory
github.com / twbs/bootstrap/issues/27915
Issue TrackingThird Party Advisory
github.com / twbs/bootstrap/pull/27047
PatchThird Party Advisory
lists.apache.org / thread.html/52e0e6b5df827ee7f1e68f7cc3babe61af3b2160f5d74a85469b7b0e%40%3Cdev.superset.apache.org%3E
lists.apache.org / thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26%40%3Ccommits.pulsar.apache.org%3E
tenable.com / security/tns-2021-14