VDB-115124 · CVE-2018-6882 · OpenVAS 56774

Synacor Zimbra Collaboration up to 8.7/8.8.6 ZmMailMsgViewgetAttachmentLinkHtml Email Attachment cross site scripting

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.6	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in Synacor Zimbra Collaboration up to 8.7/8.8.6. This impacts the function ZmMailMsgViewgetAttachmentLinkHtml. Such manipulation as part of Email Attachment leads to cross site scripting. This vulnerability is traded as CVE-2018-6882. The attack may be launched remotely. Furthermore, there is an exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Synacor Zimbra Collaboration up to 8.7/8.8.6 (Groupware Software) and classified as problematic. Affected by this issue is the function ZmMailMsgViewgetAttachmentLinkHtml. The manipulation as part of a Email Attachment leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity. CVE summarizes:

Cross-site scripting (XSS) vulnerability in the ZmMailMsgView.getAttachmentLinkHtml function in Zimbra Collaboration Suite (ZCS) before 8.7 Patch 1 and 8.8.x before 8.8.7 might allow remote attackers to inject arbitrary web script or HTML via a Content-Location header in an email attachment.

The bug was discovered 03/24/2018. The weakness was shared 03/27/2018 (Website). The advisory is shared for download at seclists.org. This vulnerability is handled as CVE-2018-6882 since 02/09/2018. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a exploit are known. The MITRE ATT&CK project declares the attack technique as T1059.007.

It is declared as attacked. 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. This issue was added on 04/19/2022 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 05/10/2022:

Apply updates per vendor instructions.

Upgrading to version 8.8.6 eliminates this vulnerability. Applying the patch 8.7 Patch 1 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Groupware Software

Vendor

Synacor

Name

Zimbra Collaboration

Version

License

free

Website

Vendor: https://synacor.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.6

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

OpenVAS ID: 56774
OpenVAS Name: Zimbra ZCS < 8.7.11 Patch 1 XSS Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Zimbra Collaboration 8.8.6
Patch: 8.7 Patch 1

Timelineinfo

02/09/2018 🔍
03/24/2018 +43 days 🔍
03/27/2018 +3 days 🔍
03/27/2018 +0 days 🔍
03/28/2018 +1 days 🔍
02/25/2025 +2526 days 🔍

Sourcesinfo

Vendor: synacor.com

Advisory: seclists.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-6882 (🔍)
GCVE (CVE): GCVE-0-2018-6882
GCVE (VulDB): GCVE-100-115124
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/28/2018 09:09
Updated: 02/25/2025 02:42
Changes: 03/28/2018 09:09 (65), 02/03/2020 18:03 (2), 04/25/2024 18:02 (28), 09/09/2024 22:30 (1), 01/27/2025 19:56 (3), 02/25/2025 02:42 (4)
Complete: 🔍
Cache ID: 216::103