CVE-2019-18873

Public Exploit

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.

Category

9.0
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 3.42% Top 15%
Third-Party Advisory github.com Third-Party Advisory sourceforge.net
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/fuzzlove/FUDforum-XSS-RCE third party advisory exploit
https://sourceforge.net/p/fudforum/code/6321/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2019-18873?
CVE-2019-18873 has been scored as a critical severity vulnerability.
How to fix CVE-2019-18873?
To fix CVE-2019-18873, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-18873 being actively exploited in the wild?
It is possible that CVE-2019-18873 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.