4.9
CVSSv3

CVE-2021-43099

Published: 28/03/2022 Updated: 04/04/2022
CVSS v2 Base Score: 4 | Impact Score: 2.9 | Exploitability Score: 8
CVSS v3 Base Score: 4.9 | Impact Score: 3.6 | Exploitability Score: 1.2
VMScore: 356
Vector: AV:N/AC:L/Au:S/C:N/I:P/A:N

Vulnerability Summary

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).

Vulnerability Trend

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diyhi bbs 5.3