Synacor Zimbra Collaboration up to 8.6.x cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability classified as problematic was found in Synacor Zimbra Collaboration up to 8.6.x (Groupware Software). Affected by this vulnerability is an unknown functionality. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. The summary by CVE is:

Multiple cross-site scripting (XSS) vulnerabilities in Zimbra Collaboration before 8.7.0 allow remote attackers to inject arbitrary web script or HTML via unspecified vectors.

The weakness was presented 08/29/2016 as Bug 105001 as confirmed bug report (Bugzilla). The advisory is shared at The public release was coordinated in cooperation with Synacor. This vulnerability is known as CVE-2016-5721 since 06/16/2016. 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. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 8.7.0 eliminates this vulnerability.

Additional details are provided at See VDB-90974 for similar entry.







CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
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NVD Base Score: 6.1
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VulDB Base Score: 🔍
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Class: Cross site scripting
CWE: CWE-79 / CWE-74 / CWE-707

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


OpenVAS ID: 800201
OpenVAS Name: Zimbra Collaboration < 8.7.0 Multiple Vulnerabilities
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

0-Day Time: 🔍

Upgrade: Zimbra Collaboration 8.7.0


06/16/2016 🔍
08/29/2016 +74 days 🔍
08/29/2016 +0 days 🔍
08/30/2016 +1 days 🔍
09/14/2022 +2206 days 🔍



Advisory: Bug 105001
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2016-5721 (🔍)
SecurityFocus: 92682

Misc.: 🔍
See also: 🔍


Created: 08/30/2016 09:12 AM
Updated: 09/14/2022 11:52 AM
Changes: 08/30/2016 09:12 AM (44), 05/10/2018 10:56 AM (15), 09/14/2022 11:45 AM (2), 09/14/2022 11:52 AM (11)
Complete: 🔍
Cache ID: 3:2AD:40


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