CVE-2022-30708 — Webmin through 1

Webmin through 1.991, when the Authentic theme is used, allows remote code execution when a user has been manually created (i.e., not created in Virtualmin or Cloudmin). This occurs because settings-editor_write.cgi does not properly restrict the file parameter.

01What is this vulnerability?

Webmin through 1.991, when the Authentic theme is used, allows remote code execution when a user has been manually created (i.e., not created in Virtualmin or Cloudmin). This occurs because settings-editor_write.cgi does not properly restrict the file parameter.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2022-05-15T02:30:14.000Z
• Last modified: 2024-08-03T06:56:13.713Z

09References

• github.com — https://github.com/webmin/webmin/issues/1635
• github.com — https://github.com/esp0xdeadbeef/rce_webmin
• www.twitch.tv — https://www.twitch.tv/videos/1483029790
• github.com — https://github.com/webmin/webmin/releases
• github.com — https://github.com/webmin/authentic-theme/releases
• webmin.com — https://webmin.com/changes.html
• github.com — https://github.com/webmin/webmin/commit/6a2334bf8b27d55c7edf0b2825cd14f3f8a69d4d
• github.com — https://github.com/esp0xdeadbeef/rce_webmin/blob/main/exploit.py