Is CVE-2023-49091 actively exploited?

No active exploitation of CVE-2023-49091 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-49091 be exploited remotely?

Yes. CVE-2023-49091 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-49091?

CVE-2023-49091 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2023-49091

CWE-613Published: November 29, 2023· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2023-49091 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.