CVE-2023-40053 — A vulnerability has been identified within Serv-U 15

A vulnerability has been identified within Serv-U 15.4 that allows an authenticated actor to insert content on the file share function feature of Serv-U, which could be used maliciously.

01What is this vulnerability?

A vulnerability has been identified within Serv-U 15.4 that allows an authenticated actor to insert content on the file share function feature of Serv-U, which could be used maliciously.

02Affected products

Vendor	Product	Versions
SolarWinds	Serv	U — 15.4 and previous versions

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

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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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: 2023-12-06T03:23:59.651Z
• Last modified: 2024-08-02T18:24:54.649Z

09References

• www.solarwinds.com — https://www.solarwinds.com/trust-center/security-advisories/CVE-2023-40053
• documentation.solarwinds.com — https://documentation.solarwinds.com/en/success_center/servu/content/release_not…