CVE-2021-43099
low-risk
Published 2022-03-28
An Archive Extraction (AKA "Zip Slip) vulnerability exists in bbs 5.3 in the UpgradeNow function in UpgradeManageAction.java, which unzips the arbitrary upladed zip file without checking filenames. The vulnerability is exploited using a specially crafted archive that holds directory traversal filenames (e.g. ../../evil.exe).
Do I need to act?
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0.61% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.9/10
Medium
NETWORK
/ LOW complexity
Affected Products (1)
Bbs
Affected Vendors
References (2)
27
/ 100
low-risk
Severity
20/34 · Moderate
Exploitability
2/34 · Minimal
Exposure
5/34 · Minimal