CVE-2019-20921

Cross-site scripting in bootstrap-select

6.1 MediumFix available

bootstrap-select before 1.13.6 allows Cross-Site Scripting (XSS). It does not escape title values in OPTION elements. This may allow attackers to execute arbitrary JavaScript in a victim's browser.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

1.74%Up 0.6 points since Apr 14, 2021

What each source reports

NVD Score used 6.1

bootstrap-select before 1.13.6 allows Cross-Site Scripting (XSS). It does not escape title values in OPTION elements. This may allow attackers to execute arbitrary JavaScript in a victim's browser.

Record: CVE-2019-20921
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness: CWE-79
Updated: 2026-11-02

CVE List No score

bootstrap-select before 1.13.6 allows Cross-Site Scripting (XSS). It does not escape title values in OPTION elements. This may allow attackers to execute arbitrary JavaScript in a victim's browser.

Record: CVE-2019-20921
Updated: 2026-11-02

EUVDEUVD-2021-0995 No score

bootstrap-select before 1.13.6 allows Cross-Site Scripting (XSS). It does not escape title values in OPTION elements. This may allow attackers to execute arbitrary JavaScript in a victim's browser.

Record: EUVD-2021-0995
Updated: 2026-11-03

GitHub AdvisoriesGHSA-7c82-mp33-r854 5.3

Cross-site scripting in bootstrap-select

bootstrap-select before 1.13.6 allows Cross-Site Scripting (XSS). It does not escape title values in OPTION elements. This may allow attackers to execute arbitrary JavaScript in a victim's browser.

Record: GHSA-7c82-mp33-r854
CVSS 4.0: 5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

GitHub AdvisoriesGHSA-9r7h-6639-v5mw No score

Cross-Site Scripting in bootstrap-select

Versions of bootstrap-select prior to 1.13.6 are vulnerable to Cross-Site Scripting (XSS). The package does not escape title values on <option> tags. This may allow attackers to execute arbitrary JavaScript in a victim's browser.

Recommendation

Upgrade to version 1.13.6 or later.

Record: GHSA-9r7h-6639-v5mw
Weakness: CWE-79
Updated: 2026-11-02

OSV 6.1

bootstrap-select before 1.13.6 allows Cross-Site Scripting (XSS). It does not escape title values in OPTION elements. This may allow attackers to execute arbitrary JavaScript in a victim's browser.

Record: CVE-2019-20921
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

Show 4 moreShow less

OSVGHSA-7c82-mp33-r854 5.3

Cross-site scripting in bootstrap-select

bootstrap-select before 1.13.6 allows Cross-Site Scripting (XSS). It does not escape title values in OPTION elements. This may allow attackers to execute arbitrary JavaScript in a victim's browser.

Record: GHSA-7c82-mp33-r854
CVSS 4.0: 5.3 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

OSVRHSA-2021:1169 7.5

Red Hat Security Advisory: RHV Manager (ovirt-engine) 4.4.z [ovirt-4.4.5] security, bug fix, enhancement

Record: RHSA-2021:1169
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVRHSA-2021:1186 7.3

Red Hat Security Advisory: RHV Manager (ovirt-engine) 4.4.z [ovirt-4.4.5] 0-day security, bug fix, enhance

Record: RHSA-2021:1186
CVSS 3.1: 7.3 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Updated: 2026-11-02

OSVGHSA-9r7h-6639-v5mw No score

Cross-Site Scripting in bootstrap-select

Recommendation

Upgrade to version 1.13.6 or later.

Record: GHSA-9r7h-6639-v5mw
Weakness: CWE-79
Updated: 2026-11-02

Affected products

snapappointments bootstrap-select

Affected packages

Affected packages
Package	Affected	Fixed
`bootstrap-select` npm	before 1.13.6	1.13.6
`bootstrap-select` NuGet	before 1.13.6	1.13.6
`bootstrap-select` NuGet	before 1.13.6, plus listed versions 1.10.01.11.01.11.11.11.21.12.0 Show 25 moreShow less 1.12.11.12.21.12.31.12.41.13.01.13.0-alpha1.13.0-beta1.13.11.13.21.13.31.13.41.13.51.3.41.3.51.4.11.5.41.6.21.6.31.6.41.7.21.7.51.8.01.8.11.9.31.9.4	1.13.6
`ovirt-web-ui` Red Hat:rhev_manager:4.4:el8	before 0:1.6.7-1.el8ev	0:1.6.7-1.el8ev
`ovirt-engine` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`ovirt-engine-backend` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`ovirt-engine-dbscripts` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`ovirt-engine-health-check-bundler` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`ovirt-engine-restapi` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`ovirt-engine-setup` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev

Show 15 moreShow less

Affected packages
Package	Affected	Fixed
`ovirt-engine-setup-base` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`ovirt-engine-setup-plugin-cinderlib` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`ovirt-engine-setup-plugin-imageio` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`ovirt-engine-setup-plugin-ovirt-engine` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`ovirt-engine-setup-plugin-ovirt-engine-common` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`ovirt-engine-setup-plugin-vmconsole-proxy-helper` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`ovirt-engine-setup-plugin-websocket-proxy` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`ovirt-engine-tools` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`ovirt-engine-tools-backup` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`ovirt-engine-vmconsole-proxy-helper` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`ovirt-engine-webadmin-portal` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`ovirt-engine-websocket-proxy` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`python3-ovirt-engine-lib` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`rhvm` Red Hat:rhev_manager:4.4:el8	before 0:4.4.5.9-0.1.el8ev	0:4.4.5.9-0.1.el8ev
`ovirt-engine-ui-extensions` Red Hat:rhev_manager:4.4:el8	before 0:1.2.5-1.el8ev	0:1.2.5-1.el8ev

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-20921 is a medium vulnerability (CVSS 6.1) in Snapappointments Bootstrap-select, published September 3, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.74%, the 77th percentile. Fixed in bootstrap-select 1.13.6.

References

Show 60 moreShow less