CVE-2020-5903

MEDIUM

F5 BIG-IP 12.1.0-12.1.5.1 - Cross-Site Scripting in Configuration Utility

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2020-5903. PoCs published by ltvthang.

AI-analyzed exploit summary The repository contains functional exploit code for CVE-2020-5902 (mislabeled as CVE-2020-5903 in the repo), targeting F5 BIG-IP devices. It includes a Java-based RCE exploit leveraging HSQLDB deserialization and direct command injection via TMSH endpoints.

Description

In BIG-IP versions 15.0.0-15.1.0.3, 14.1.0-14.1.2.5, 13.1.0-13.1.3.3, 12.1.0-12.1.5.1, a Cross-Site Scripting (XSS) vulnerability exists in an undisclosed page of the BIG-IP Configuration utility.

Exploits (1)

nomisec WORKING POC
by ltvthang · poc
https://github.com/ltvthang/CVE-2020-5903

The repository contains functional exploit code for CVE-2020-5902 (mislabeled as CVE-2020-5903 in the repo), targeting F5 BIG-IP devices. It includes a Java-based RCE exploit leveraging HSQLDB deserialization and direct command injection via TMSH endpoints.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: F5 BIG-IP (TMUI)
No auth needed
Prerequisites: Java JDK · hsqldb.jar 1.8 · ysoserial
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (2)

Core 2
Core References
Vendor Advisory x_refsource_misc
https://support.f5.com/csp/article/K43638305
Third Party Advisory, US Government Resource third-party-advisory x_refsource_cert-vn
https://www.kb.cert.org/vuls/id/290915

Scores

CVSS v3 6.1
EPSS 0.0223
EPSS Percentile 80.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Details

CWE
CWE-79
Status published
Products (11)
f5/big-ip_access_policy_manager 12.1.0 - 12.1.5
f5/big-ip_advanced_firewall_manager 12.1.0 - 12.1.5
f5/big-ip_analytics 12.1.0 - 12.1.5
f5/big-ip_application_acceleration_manager 12.1.0 - 12.1.5
f5/big-ip_application_security_manager 12.1.0 - 12.1.5
f5/big-ip_domain_name_system 12.1.0 - 12.1.5
f5/big-ip_fraud_protection_service 12.1.0 - 12.1.5
f5/big-ip_global_traffic_manager 12.1.0 - 12.1.5
f5/big-ip_link_controller 12.1.0 - 12.1.5
f5/big-ip_local_traffic_manager 12.1.0 - 12.1.5
... and 1 more
Published Jul 01, 2020
Tracked Since Feb 18, 2026