What is CVE-2023-39903?

CVE-2023-39903 is a medium-severity vulnerability in Fujitsu Software Infrastructure Manager, classified under Cleartext Storage of Sensitive Information. CVSS score: 5.9/10. Published 2023-08-07.

How severe is CVE-2023-39903?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Fujitsu Software Infrastructure Manager

CVE-2023-39903

An issue was discovered in Fujitsu Software Infrastructure Manager (ISM) before 2.8.0.061. The ismsnap component (in this specific case at /var/log/fujitsu/ServerViewSuite/ism/FirmwareManagement/FirmwareManagement.log) allows insecure collection and storage of authorization credentials in cleartext. That occurs when users perform any ISM Firmware Repository Address setup test (Test the Connection), or regularly authorize against an already configured remote firmware repository site, as set up in ISM Firmware Repository Address. A privileged attacker is therefore able to potentially gather the associated ismsnap maintenance data, in the same manner as a trusted party allowed to export ismsnap data from ISM. The preconditions for an ISM installation to be generally vulnerable are that the Download Firmware (Firmware Repository Server) function is enabled and configured, and that the character \ (backslash) is used in a user credential (i.e., user/ID or password) of the remote proxy host / firmware repository server. NOTE: this may overlap CVE-2023-39379.

Published 2023-08-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.001 (2.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000

Affected products

Fujitsu Software Infrastructure Manager

Weakness classification (CWE)

CWE-312 — Cleartext Storage of Sensitive Information

References

security.ts.fujitsu.com/ProductSecurity/content/Fujitsu-PSIRT-ISS-IS-2023-07141… (Patch, Vendor Advisory)
security.ts.fujitsu.com/IndexDownload.asp (Patch)

Frequently asked questions

What is CVE-2023-39903?: CVE-2023-39903 is a medium-severity vulnerability in Fujitsu Software Infrastructure Manager, classified under Cleartext Storage of Sensitive Information. CVSS score: 5.9/10. Published 2023-08-07.
How severe is CVE-2023-39903?: Medium severity. CVSS v3 base score is 5.9 out of 10.