Vulnerability Monitor

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CVE-2016-3403

Multiple cross-site request forgery (CSRF) vulnerabilities in the Admin Console in Zimbra Collaboration before 8.6.0 Patch 8 allow remote attackers to hijack the authentication of administrators for requests that (1) add, (2) modify, or (3) remove accounts by leveraging failure to use of a CSRF token and perform referer header checks, aka bugs 100885 and 100899.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.8, indicating it can be exploited remotely over the network with relatively low complexity though user interaction is required and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 1 product from synacor organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2017-05-17T14:29:00.290

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 8.8 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

8.6

Impact Score

6.4

Weaknesses

Type: Primary
CWE-352

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	synacor	zimbra_collaboration_suite	≤ 8.6.0	Yes

References

http://seclists.org/fulldisclosure/2017/Jan/30 Exploit, Third Party Advisory, VDB Entry ([email protected])
http://www.securityfocus.com/bid/95383 Third Party Advisory, VDB Entry ([email protected])
https://bugzilla.zimbra.com/show_bug.cgi?id=100885 Issue Tracking ([email protected])
https://bugzilla.zimbra.com/show_bug.cgi?id=100899 Issue Tracking ([email protected])
https://sysdream.com/news/lab/2017-01-12-cve-2016-3403-multiple-csrf-in-zimbra-administration-interface/ Exploit, Third Party Advisory ([email protected])
https://wiki.zimbra.com/wiki/Zimbra_Releases/8.6_Patch_8 Patch, Release Notes ([email protected])
https://wiki.zimbra.com/wiki/Zimbra_Releases/8.7.0 Release Notes ([email protected])
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories Vendor Advisory ([email protected])
http://seclists.org/fulldisclosure/2017/Jan/30 Exploit, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/95383 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.zimbra.com/show_bug.cgi?id=100885 Issue Tracking (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.zimbra.com/show_bug.cgi?id=100899 Issue Tracking (af854a3a-2127-422b-91ae-364da2661108)
https://sysdream.com/news/lab/2017-01-12-cve-2016-3403-multiple-csrf-in-zimbra-administration-interface/ Exploit, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://wiki.zimbra.com/wiki/Zimbra_Releases/8.6_Patch_8 Patch, Release Notes (af854a3a-2127-422b-91ae-364da2661108)
https://wiki.zimbra.com/wiki/Zimbra_Releases/8.7.0 Release Notes (af854a3a-2127-422b-91ae-364da2661108)
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For synacor's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.