FUDForum 3.0.9 nlogin Stored cross site scripting

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
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6.1$0-$5k0.00

A vulnerability was found in FUDForum 3.0.9 (Forum Software). It has been classified as problematic. Affected is an unknown code block. The manipulation of the argument nlogin as part of a POST Request leads to a cross site scripting vulnerability (Stored). CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

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.

The weakness was published 11/13/2019. This vulnerability is traded as CVE-2019-18839 since 11/09/2019. It is possible to launch the attack remotely. The requirement for exploitation is a authentication. Successful exploitation requires user interaction by the victim. Technical details and a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1059.007.

A public exploit has been developed by liquidsky in Javascript and been published even before and not after the advisory. The exploit is shared for download at github.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 18 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Similar entry is available at VDB-145305.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

Video

Youtube: Not available anymore

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.2
VulDB Meta Temp Score: 6.1

VulDB Base Score: 3.5
VulDB Temp Score: 3.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.0
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Stored
Class: Cross site scripting / Stored
CWE: CWE-79 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: liquidsky
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/26/2019 🔍
11/09/2019 +14 days 🔍
11/13/2019 +4 days 🔍
11/14/2019 +1 days 🔍
02/13/2024 +1552 days 🔍

Sourcesinfo

Advisory: 155261
Status: Not defined

CVE: CVE-2019-18839 (🔍)
scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 11/14/2019 04:12 PM
Updated: 02/13/2024 03:03 PM
Changes: 11/14/2019 04:12 PM (35), 11/16/2019 05:56 PM (21), 11/16/2019 05:57 PM (4), 02/13/2024 03:03 PM (8)
Complete: 🔍
Committer: misc
Cache ID: 3:EFE:40

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