What is CVE-2023-38357?

CVE-2023-38357 is a medium-severity vulnerability in Rws Worldserver, classified under Insufficient Entropy. CVSS score: 5.3/10. Published 2023-08-01.

How severe is CVE-2023-38357?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Rws Worldserver

CVE-2023-38357

Session tokens in RWS WorldServer 11.7.3 and earlier have a low entropy and can be enumerated, leading to unauthorized access to user sessions.

Published 2023-08-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.053 (92.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.053 · newest: 0.053 · change: 0.000

Affected products

Rws Worldserver

Weakness classification (CWE)

CWE-331 — Insufficient Entropy

References

seclists.org/fulldisclosure/2023/Jul/30 (mailing-list, Exploit, Mailing List, Third Party Advisory)
packetstormsecurity.com/files/173609/RWS-WorldServer-11.7.3-Session-Token-Enume… (Exploit, VDB Entry, Third Party Advisory)
www.redteam-pentesting.de/en/advisories/rt-sa-2023-001/-session-token-enumerati… (Third Party Advisory)

Frequently asked questions

What is CVE-2023-38357?: CVE-2023-38357 is a medium-severity vulnerability in Rws Worldserver, classified under Insufficient Entropy. CVSS score: 5.3/10. Published 2023-08-01.
How severe is CVE-2023-38357?: Medium severity. CVSS v3 base score is 5.3 out of 10.