VulnerabilityModified
CVE-2018-20677
In Bootstrap before 3.4.0, XSS is possible in the affix configuration target property.
MEDIUM 6.1EPSS 3.98%
Does this matter?
Lower severity and a low EPSS score (3.98%). Track it; it rarely justifies an emergency change on its own.
Description
In Bootstrap before 3.4.0, XSS is possible in the affix configuration target property.
- CVSS 3.0
- 6.1 MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 3.98% probability · 90th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- getbootstrap/bootstrap
- Source
- cve@mitre.org
EPSS moved from 5.4% on 21 September 2026 to 4.0% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- https://access.redhat.com/errata/RHBA-2019:1076
- https://access.redhat.com/errata/RHBA-2019:1570
- https://access.redhat.com/errata/RHSA-2019:1456
- https://access.redhat.com/errata/RHSA-2019:3023
- https://access.redhat.com/errata/RHSA-2020:0132
- https://access.redhat.com/errata/RHSA-2020:0133
- https://blog.getbootstrap.com/2018/12/13/bootstrap-3-4-0/Release Notes, Vendor Advisory
- https://github.com/twbs/bootstrap/issues/27045Exploit, Issue Tracking, Third Party Advisory
- https://github.com/twbs/bootstrap/issues/27915#issuecomment-452140906Issue Tracking, Third Party Advisory
- https://github.com/twbs/bootstrap/issues/27915#issuecomment-452196628Issue Tracking, Third Party Advisory
- https://github.com/twbs/bootstrap/pull/27047Patch, Third Party Advisory
- https://lists.apache.org/thread.html/52e0e6b5df827ee7f1e68f7cc3babe61af3b2160f5d74a85469b7b0e%40%3Cdev.superset.apache.org%3E
- https://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26%40%3Ccommits.pulsar.apache.org%3E
- https://www.tenable.com/security/tns-2021-14
- https://access.redhat.com/errata/RHBA-2019:1076
- https://access.redhat.com/errata/RHBA-2019:1570
- https://access.redhat.com/errata/RHSA-2019:1456
- https://access.redhat.com/errata/RHSA-2019:3023
- https://access.redhat.com/errata/RHSA-2020:0132
- https://access.redhat.com/errata/RHSA-2020:0133
- https://blog.getbootstrap.com/2018/12/13/bootstrap-3-4-0/Release Notes, Vendor Advisory
- https://github.com/twbs/bootstrap/issues/27045Exploit, Issue Tracking, Third Party Advisory
- https://github.com/twbs/bootstrap/issues/27915#issuecomment-452140906Issue Tracking, Third Party Advisory
- https://github.com/twbs/bootstrap/issues/27915#issuecomment-452196628Issue Tracking, Third Party Advisory
- https://github.com/twbs/bootstrap/pull/27047Patch, Third Party Advisory
- https://lists.apache.org/thread.html/52e0e6b5df827ee7f1e68f7cc3babe61af3b2160f5d74a85469b7b0e%40%3Cdev.superset.apache.org%3E
- https://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26%40%3Ccommits.pulsar.apache.org%3E
- https://www.tenable.com/security/tns-2021-14
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.