What is CVE-2023-49091?

CVE-2023-49091 is a high-severity vulnerability in Azukaar Cosmos-Server, classified under Insufficient Session Expiration. CVSS score: 8.8/10. Published 2023-11-29.

How severe is CVE-2023-49091?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Azukaar Cosmos-Server

CVE-2023-49091

Cosmos provides users the ability self-host a home server by acting as a secure gateway to your application, as well as a server manager. Cosmos-server is vulnerable due to to the authorization header used for user login remaining valid and not expiring after log out. This vulnerability allows an attacker to use the token to gain unauthorized access to the application/system even after the user has logged out. This issue has been patched in version 0.13.1.

Published 2023-11-29 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (55.5th percentile), scored 2026-10-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Azukaar Cosmos-Server — versions < 0.13.1
Cosmos-Cloud Cosmos Server — versions 0.1.15, 0.1.16, 0.1.17

Weakness classification (CWE)

CWE-613 — Insufficient Session Expiration

References

github.com/azukaar/Cosmos-Server/security/advisories/GHSA-hpvm-x7m8-3c6x (Exploit, Vendor Advisory)
github.com/azukaar/Cosmos-Server/commit/7a3fdfb467bd4d1f8333e3e1f3c3f5fca0b69cd7 (Patch)

Frequently asked questions

What is CVE-2023-49091?: CVE-2023-49091 is a high-severity vulnerability in Azukaar Cosmos-Server, classified under Insufficient Session Expiration. CVSS score: 8.8/10. Published 2023-11-29.
How severe is CVE-2023-49091?: High severity. CVSS v3 base score is 8.8 out of 10.