CVE-2023-44275 — OPNsense before 23

OPNsense before 23.7.5 allows XSS via the index.php column_count parameter to the Lobby Dashboard.

01What is this vulnerability?

OPNsense before 23.7.5 allows XSS via the index.php column_count parameter to the Lobby Dashboard.

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: 2023-09-28T00:00:00.000Z
• Last modified: 2024-09-23T19:12:11.940Z

09References

• www.x41-dsec.de — https://www.x41-dsec.de/lab/advisories/x41-2023-001-opnsense
• github.com — https://github.com/opnsense/core/compare/23.7.4...23.7.5
• github.com — https://github.com/opnsense/core/commit/484753b2abe3fd0fcdb73d8bf00c3fc3709eb8b7