CVE-2023-24044 — A Host Header Injection issue on the Login page of Plesk Obsidian through 18

A Host Header Injection issue on the Login page of Plesk Obsidian through 18.0.49 allows attackers to redirect users to malicious websites via a Host request header. NOTE: the vendor's position is "the ability to use arbitrary domain names to access the panel is an inte

01What is this vulnerability?

A Host Header Injection issue on the Login page of Plesk Obsidian through 18.0.49 allows attackers to redirect users to malicious websites via a Host request header. NOTE: the vendor's position is "the ability to use arbitrary domain names to access the panel is an intended feature."

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: 2023-01-22T00:00:00.000Z
• Last modified: 2025-04-02T15:49:05.161Z

09References

• gist.github.com — https://gist.github.com/TJetnipat/02b3854543b7ec95d54a8de811f2e8ae
• medium.com — https://medium.com/%40jetnipat.tho/cve-2023-24044-10e48ab940d8
• support.plesk.com — https://support.plesk.com/hc/en-us/articles/10254625170322-Vulnerability-CVE-202…