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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.37%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.0
- 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 1.37% probability · 72th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-352
- Affected
- synacor/zimbra collaboration suite
- Source
- cve@mitre.org
EPSS 1.4% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://seclists.org/fulldisclosure/2017/Jan/30Exploit, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/95383Third Party Advisory, VDB Entry
- https://bugzilla.zimbra.com/show_bug.cgi?id=100885Issue Tracking
- https://bugzilla.zimbra.com/show_bug.cgi?id=100899Issue Tracking
- https://sysdream.com/news/lab/2017-01-12-cve-2016-3403-multiple-csrf-in-zimbra-administration-interface/Exploit, Third Party Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Releases/8.6_Patch_8Patch, Release Notes
- https://wiki.zimbra.com/wiki/Zimbra_Releases/8.7.0Release Notes
- https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
- http://seclists.org/fulldisclosure/2017/Jan/30Exploit, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/95383Third Party Advisory, VDB Entry
- https://bugzilla.zimbra.com/show_bug.cgi?id=100885Issue Tracking
- https://bugzilla.zimbra.com/show_bug.cgi?id=100899Issue Tracking
- https://sysdream.com/news/lab/2017-01-12-cve-2016-3403-multiple-csrf-in-zimbra-administration-interface/Exploit, Third Party Advisory
- https://wiki.zimbra.com/wiki/Zimbra_Releases/8.6_Patch_8Patch, Release Notes
- https://wiki.zimbra.com/wiki/Zimbra_Releases/8.7.0Release Notes
- https://wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.