Issabel PBX 4 Create New Rate index.php Name/Prefix cross site scripting

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CVSS Meta Temp Score
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CTI Interest Score
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3.5$0-$5k0.03

A vulnerability classified as problematic has been found in Issabel PBX 4 (Communications System). This affects an unknown functionality of the file index.php?menu=billing_rates of the component Create New Rate. The manipulation of the argument Name/Prefix 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. The summary by CVE is:

A stored cross site scripting (XSS) vulnerability in index.php?menu=billing_rates of Issabel PBX version 4 allows attackers to execute arbitrary web scripts or HTML via a crafted payload entered into the "Name" or "Prefix" fields under the "Create New Rate" module.

The weakness was released 07/07/2021. It is possible to read the advisory at research.0xdutra.com. This vulnerability is uniquely identified as CVE-2021-34190. The exploitability is told to be easy. It is possible to initiate the attack remotely. The successful exploitation needs a authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 4.0.1-0 eliminates this vulnerability. The upgrade is hosted for download at repo.issabel.org. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 2 days after the disclosure of the vulnerability.

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

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

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfoedit

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: 🔍

Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔒
0-Day Time: 🔒
Exposure Time: 🔒

Upgrade: PBX 4.0.1-0
Patch: github.com

Timelineinfoedit

07/07/2021 Advisory disclosed
07/07/2021 +0 days VulDB entry created
07/09/2021 +1 days Countermeasure disclosed
07/10/2021 +1 days VulDB last update

Sourcesinfoedit

Advisory: research.0xdutra.com
Status: Not defined

CVE: CVE-2021-34190 (🔒)

Entryinfoedit

Created: 07/07/2021 08:31 AM
Updated: 07/10/2021 08:22 AM
Changes: (1) countermeasure_name
Complete: 🔍
Committer: asternic

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