2021-39250 | Invision Power Services Community Suite IFRAME 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 (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.4	$0-$5k	0.30

A vulnerability was found in Invision Power Services Community Suite up to 4.6.5.0. It has been classified as problematic. Affected is an unknown code block of the component IFRAME Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. This is going to have an impact on integrity. An attacker might be able to inject arbitrary html and script code into the web site. This would alter the appearance and would make it possible to initiate further attacks against site visitors. CVE summarizes:

Invision Community (aka IPS Community Suite or IP-Board) before 4.6.5.1 allows stored XSS, with resultant code execution, because an uploaded file can be placed in an IFRAME element within user-generated content. For code execution, the attacker can rely on the ability of an admin to install widgets, disclosure of the admin session ID in a Referer header, and the ability of an admin to use the templating engine (e.g., Edit HTML).

The weakness was disclosed 08/18/2021. The advisory is shared for download at ssd-disclosure.com. This vulnerability is traded as CVE-2021-39250 since 08/17/2021. The exploitability is told to be easy. It is possible to launch the attack remotely. The requirement for exploitation is a authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 4.6.5.1 eliminates this vulnerability. The upgrade is hosted for download at invisioncommunity.com.

Vendor

Name

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Class: Cross site scripting
CWE: CWE-79
ATT&CK: T1059.007

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Community Suite 4.6.5.1

08/17/2021 CVE assigned
08/18/2021 +1 days Advisory disclosed
08/18/2021 +0 days VulDB entry created
08/19/2021 +1 days VulDB last updateVendor: https://invisioncommunity.com/

Advisory: ssd-disclosure.com
Status: Confirmed

CVE: CVE-2021-39250 (🔒)

Created: 08/18/2021 09:22
Updated: 08/19/2021 19:20
Changes: (2) source_cve_assigned source_cve_nvd_summary
Complete: 🔍

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