cve.bz

CVE-2019-10842

9.8 criticalEPSS 4.9%

Critical (9.8) in getbootstrap bootstrap-sass. EPSS 4.9% chance of exploitation in the next 30 days. Fixed in bootstrap-sass 3.2.0.4.

Arbitrary code execution (via backdoor code) was discovered in bootstrap-sass 3.2.0.3, when downloaded from rubygems.org. An unauthenticated attacker can craft the ___cfduid cookie value with base64 arbitrary code to be executed via eval(), which can be leveraged to execute arbitrary code on the target system. Note that there are three underscore characters in the cookie name. This is unrelated to the __cfduid cookie that is legitimately used by Cloudflare.

Severity

CVSS 3.0

9.8 critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
4.9% chance of exploitation in the next 30 days; higher than 92% of CVEs (scores of 2026-10-31)
CWE
CWE-94
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-vqqv-v9m2-48p2RubyGemsbootstrap-sass>=3.2.0.3 <3.2.0.43.2.0.4

References

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