CVE-2019-18839 — CRITICAL (9.0)

Vulnerability Description

FUDForum 3.0.9 is vulnerable to Stored XSS via the nlogin parameter. This may result in remote code execution. An attacker can use a user account to fully compromise the system using a POST request. When the admin visits the user information, the payload will execute. This will allow for PHP files to be written to the web root, and for code to execute on the remote server.

CVSS Score

9.0

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Fudforum	Fudforum	3.0.9

Related Weaknesses (CWE)

CWE-78 CWE-79

References

https://github.com/fuzzlove/FUDforum-XSS-RCEExploitThird Party Advisory
https://packetstormsecurity.com/files/155261/FUDForum-3.0.9-Code-Execution-CrossExploitThird Party AdvisoryVDB Entry
https://github.com/fuzzlove/FUDforum-XSS-RCEExploitThird Party Advisory
https://packetstormsecurity.com/files/155261/FUDForum-3.0.9-Code-Execution-CrossExploitThird Party AdvisoryVDB Entry

FAQ

What is CVE-2019-18839?

CVE-2019-18839 is a vulnerability with a CVSS score of 9.0 (CRITICAL). FUDForum 3.0.9 is vulnerable to Stored XSS via the nlogin parameter. This may result in remote code execution. An attacker can use a user account to fully compromise the system using a POST request. W...

How severe is CVE-2019-18839?

CVE-2019-18839 has been rated CRITICAL with a CVSS base score of 9.0/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2019-18839?

Check the references section above for vendor advisories and patch information. Affected products include: Fudforum Fudforum.