CVE-2019-25237 — V-SOL GPON/EPON OLT Platform v2

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

01What is this vulnerability?

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.

02Affected products

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

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2025-12-24T19:27:56.411Z
• Last modified: 2025-12-24T20:23:45.916Z

09References

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