PatchTheCVECVE-2019-20921: bootstrap-select before 1.13.6 allows Cross-Site Scripting (XSS)
CVE-2019-20921 is a medium-severity flaw (CVSS 6.1) affecting bootstrap-select. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.1 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 1.7% (top 22%) |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2020-09-30 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2019-20921?
bootstrap-select: upgrade to 1.13.6. Exact commands for each OS are on this page.
Is CVE-2019-20921 being exploited?
CVE-2019-20921 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2019-20921 affect?
CVE-2019-20921 affects bootstrap-select. Severity is medium (CVSS 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.
How urgent is CVE-2019-20921?
Priority 41/100. No elevated risk signals yet.