Vulnerability identifier: #VU78242
Vulnerability risk: High
CVSSv3.1: 5.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:H/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-79
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Zimbra Collaboration
Web applications /
Webmail solutions
Vendor: Synacor Inc.
Description
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in the Zimbra Classic Web Client. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Note, the vulnerability is being exploited in the wild.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Zimbra Collaboration: 8.8.15 - 8.8.15 Patch 40
External links
http://info.zimbra.com/security-update-zimbra-collaboration-suite-version-8.8.15-important
http://twitter.com/maddiestone/status/1679542322772721664
http://wiki.zimbra.com/wiki/Security_Center#ZCS_8.8.15_Patch_41_Released
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.