CVE-2021-31762: Webmin 1.973 is affected by Cross Site Request Forgery (CSRF) to create a privileged user through Webmin's add users feature, and then get a reverse shell…

PriorityP259high8.8CVSS 3.1

AVNACLPRNUIRSUCHIHAH

EXPLOIT

EPSS

8.78%

94.5th percentile

Webmin 1.973 is affected by Cross Site Request Forgery (CSRF) to create a privileged user through Webmin's add users feature, and then get a reverse shell through Webmin's running process feature.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
webmin	webmin	—	—

Detection & IOCsextracted from sources · hover to see the quote

·The exploit targets Webmin version 1.973 specifically; verify the installed version before applying detections, as the vulnerable endpoint /acl/save_user.cgi may behave differently in other versions. ↗
·The exploit author notes it was tested on 'All versions', suggesting the CSRF vulnerability in save_user.cgi may not be strictly limited to 1.973 — broaden detection scope accordingly. ↗

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P

CVEs like this are exactly what “Exploited This Week” covers.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.