Communigate Pro up to 6.2.0 WebMail Stored cross site scripting

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability classified as problematic was found in Communigate Pro up to 6.2.0. Affected by this vulnerability is an unknown code of the component WebMail. The manipulation with an unknown input leads to a cross site scripting vulnerability (Stored). The CWE definition for the vulnerability is CWE-79. The software 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. As an impact it is known to affect integrity. The summary by CVE is:

The WebMail components (Crystal, pronto, and pronto4) in CommuniGate Pro before 6.2.1 have stored XSS vulnerabilities via (1) the location or details field of a Google Calendar invitation, (2) a crafted calendar (aka Hotmail Calendar) invitation, (3) e-mail granting access to a directory that has JavaScript in its name, (4) JavaScript in a note name, (5) JavaScript in a task name, or (6) HTML e-mail that is mishandled in the Inbox component.

The bug was discovered 11/24/2017. The weakness was released 11/27/2017 (Website). The advisory is shared at This vulnerability is known as CVE-2017-16962 since 11/27/2017. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details are unknown but a public exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

It is possible to download the exploit at It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 6.2.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (43177).



CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.0

VulDB Base Score: 4.3
VulDB Temp Score: 3.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍



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

NVD Base Score: 🔍


Name: Stored
Class: Cross site scripting / Stored
CWE: CWE-79 / CWE-74 / CWE-707
ATT&CK: T1059.007

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Exploit-DB: 🔍

Threat Intelligenceinfo

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


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Communigate Pro 6.2.1


11/24/2017 🔍
11/27/2017 +3 days 🔍
11/27/2017 +0 days 🔍
11/27/2017 +0 days 🔍
11/27/2017 +0 days 🔍
01/16/2023 +1876 days 🔍


Advisory: 145095
Status: Not defined

CVE: CVE-2017-16962 (🔍)
scip Labs:


Created: 11/27/2017 04:23 PM
Updated: 01/16/2023 12:16 PM
Changes: 11/27/2017 04:23 PM (59), 12/10/2019 05:08 PM (4), 01/16/2023 12:16 PM (4)
Complete: 🔍


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