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UBUNTU-CVE-2018-20677
In Bootstrap before 3.4.0, XSS is possible in the affix configuration target property.
AI summary snake-internal / snake-template-v1
A weakness called UBUNTU-CVE-2018-20677 was discovered in In Bootstrap before.
Severity is Info. Low severity or not yet rated.
What you should do: update the affected software to the latest version. If unsure, ask your IT team or search the vendor's site for "In Bootstrap before UBUNTU-CVE-2018-20677".
UBUNTU-CVE-2018-20677 (In Bootstrap before). Severity: Info.
Response plan:
1. Check the vendor advisory for affected versions and the patched release.
2. If a vulnerable version is running in production, schedule maintenance (urgency from KEV/CVSS).
3. If no patch yet, mitigate via WAF rule, disabling the affected feature, etc.
4. Monitor logs / SIEM for known IOC and PoC signatures of this CVE.
PoCs and fix commits: see the 'References' section, MITRE, and NVD.
❓ What is the problem
A weakness (UBUNTU-CVE-2018-20677) in In Bootstrap before. A serious software flaw has been identified.
📍 Affected scope
Target versions of In Bootstrap before (see vendor advisory). If running in production, identify exposure immediately.
🔥 Severity
Severity: Info. Low severity or not yet rated.
🔧 How to fix
Update to the patched release as listed in the vendor advisory.
🛡️ Workaround
If a patch is not yet available, consider disabling the affected feature, applying WAF rules, blocking via network ACLs, or isolating the vulnerable version.
🔍 Detection
Check version information, scan dependencies via SBOM, and monitor SIEM for IOC and PoC signatures related to this CVE.
Affected packages
Ubuntu:16.04:LTS
twitter-bootstrap
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:16.04:LTS
twitter-bootstrap3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:18.04:LTS
twitter-bootstrap
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:18.04:LTS
twitter-bootstrap3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:20.04:LTS
twitter-bootstrap4
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:22.04:LTS
twitter-bootstrap4
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:24.04:LTS
twitter-bootstrap4
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:25.10
twitter-bootstrap4
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:26.04:LTS
twitter-bootstrap4
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
References
- report https://ubuntu.com/security/CVE-2018-20677
- report https://blog.getbootstrap.com/2018/12/13/bootstrap-3-4-0/
- report https://github.com/twbs/bootstrap/issues/27045
- report https://github.com/twbs/bootstrap/issues/27915#issuecomment-452140906
- report https://github.com/twbs/bootstrap/issues/27915#issuecomment-452196628
- report https://github.com/twbs/bootstrap/pull/27047
- report https://www.cve.org/CVERecord?id=CVE-2018-20677