CVE-2023-2158: Impersonation through User-Controlled Token

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-04-27 · updated 2026-06-17
Weakness: CWE-321

Description

Code Dx versions prior to 2023.4.2 are vulnerable to user impersonation attack where a malicious actor is able to gain access to another user's account by crafting a custom "Remember Me" token. This is possible due to the use of a hard-coded cipher which was used when generating the token. A malicious actor who creates this token can supply it to a separate Code Dx system, provided they know the username they want to impersonate, and impersonate the user. Score 6.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:P/RL:O/RC:C

Affected products

Synopsys Code Dx: before 2023.4.2 — fixed in 2023.4.2

How to fix

Upgrade to a fixed version: Synopsys Code Dx 2023.4.2. Check the vendor advisory for mitigations.

References

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