---
id: CVE-2025-15099
title: A vulnerability was identified in simstudioai sim up to 0.5.27
summary: >-
  A vulnerability was identified in simstudioai sim up to 0.5.27. This
  vulnerability affects unknown code of the file apps/sim/lib/auth/internal.ts
  of the component CRON Secret Handler. The manipulation of the argument
  INTERNAL_API_SECRET …
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-287
vendor: sim
product: sim
affected:
  - sim <= 0.5.27
published: '2025-12-26'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T13:10:00.713'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-15099'
references:
  - url: 'https://gist.github.com/H2u8s/c533741e1b36f6245d41cace89a7f4d2'
    label: cna@vuldb.com
  - url: >-
      https://gist.github.com/H2u8s/c533741e1b36f6245d41cace89a7f4d2#-steps-to-reproduce
    label: cna@vuldb.com
  - url: >-
      https://github.com/simstudioai/sim/commit/e359dc2946b12ed5e45a0ec9c95ecf91bd18502a
    label: cna@vuldb.com
  - url: 'https://github.com/simstudioai/sim/pull/2343'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?ctiid.338430'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?id.338430'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?submit.710255'
    label: cna@vuldb.com
  - url: >-
      https://gist.github.com/H2u8s/c533741e1b36f6245d41cace89a7f4d2#-steps-to-reproduce
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00788
epssPercentile: 0.54741
ingestedAt: '2026-10-07T13:31:04.573Z'
---

## Overview

A vulnerability was identified in simstudioai sim up to 0.5.27. This vulnerability affects unknown code of the file apps/sim/lib/auth/internal.ts of the component CRON Secret Handler. The manipulation of the argument INTERNAL_API_SECRET leads to improper authentication. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The identifier of the patch is e359dc2946b12ed5e45a0ec9c95ecf91bd18502a. Applying a patch is the recommended action to fix this issue.

## Affected

- `sim <= 0.5.27`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.