{"affected":[{"defaultStatus":"unaffected","ecosystem":"github","packageName":"webmin/usermin","product":"usermin","source":"CNA: VulnCheck","vendor":"webmin","versions":[{"lessThanOrEqual":"2.570","status":"affected","version":"0","versionType":"custom"}]}],"cveId":"CVE-2026-123620","cwes":["CWE-78"],"description":"Usermin through 2.570 contains an OS command injection vulnerability in the Read Mail module that allows authenticated users to execute commands through unsanitized IMAP folder names. Attackers can create a folder containing shell metacharacters via an external IMAP client, then delete it in Usermin to run commands as their system account, bypassing webmail-only restrictions.","epss":{"date":"2026-11-09","percentile":0.72239,"score":0.01376},"exploits":[],"kev":null,"metrics":[{"score":7.7,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":7.5,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},{"score":7.7,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":7.5,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1794266235773,"publishedAt":1793977255708,"references":[{"source":"CNA: VulnCheck","tags":["issue-tracking"],"url":"https://github.com/webmin/usermin/issues/142"},{"source":"CNA: VulnCheck","tags":["product"],"url":"https://github.com/webmin/usermin"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/webmin/usermin/commit/8a45420282ff04c943f05d9241a3c55afb9bca79"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/webmin/usermin/blob/2.570/mailbox/mailbox-lib.pl#L1031-L1040"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://hackmd.io/@leediay/H144QKY6zl"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/usermin-through-2.570-os-command-injection-via-read-mail-imap-folder-deletion"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/webmin/usermin"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/webmin/usermin/blob/2.570/mailbox/mailbox-lib.pl#L1031-L1040"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/webmin/usermin/commit/8a45420282ff04c943f05d9241a3c55afb9bca79"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/webmin/usermin/issues/142"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://hackmd.io/@leediay/H144QKY6zl"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/usermin-through-2.570-os-command-injection-via-read-mail-imap-folder-deletion"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/webmin/usermin/commit/8a45420282ff04c943f05d9241a3c55afb9bca79"}],"revision":"df97ffcdc97e0b059eda78dd1e6af82ee097a2d6e89ce3771f7a275642e2203a","sources":[{"modifiedAt":1794264340895,"name":"CNA: VulnCheck","retrievedAt":1794265753693,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123620"},{"modifiedAt":1794266235773,"name":"NVD","retrievedAt":1794269915745,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123620"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794265766480,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-123620"}],"ssvc":{"assessedAt":1794263767567,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"Usermin through 2.570 OS Command Injection via Read Mail IMAP Folder Deletion","updatedAt":1794269915745}