CVE-2019-18873

CRITICAL
9
CVSS Score
Published: November 12, 2019 at 01:01 AM UTC
Updated: June 17, 2026 at 02:25 AM UTC
1 product affected across 1 vendorFudforum

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Severity
CRITICAL9
Exploit prediction
EPSS 8%

Description

FUDForum 3.0.9 is vulnerable to Stored XSS via the User-Agent HTTP header. This may result in remote code execution. An attacker can use a user account to fully compromise the system via a GET request. When the admin visits user information under "User Manager" in the control panel, 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. The problem is in admsession.php and admuser.php.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_MISCExploitThird Party Advisory
https://github.com/fuzzlove/FUDforum-XSS-RCE
x_refsource_MISCThird Party Advisory
https://sourceforge.net/p/fudforum/code/6321/

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-78CWE-79

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