# CVE-2018-6882: Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability

> CVE-2018-6882: Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability. CVSS 6.1 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2018-6882
Last updated: 2026-10-01T19:33:16Z

- Published: 2018-03-27 16:00 UTC · Updated: 2026-10-01 19:33 UTC · Assigner: mitre
- CVSS: 6.1 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS: 29.8%, 98th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-04-19, federal due date 2022-05-10, ransomware use: Known

## Description

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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Synacor: Zimbra Collaboration Suite (ZCS)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2018-6882)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2018-6882)
- [https://bugzilla.zimbra.com/show\_bug.cgi?id=108786](https://bugzilla.zimbra.com/show_bug.cgi?id=108786)
- [http://seclists.org/fulldisclosure/2018/Mar/52](http://seclists.org/fulldisclosure/2018/Mar/52)
- [https://wiki.zimbra.com/wiki/Zimbra\_Releases/8.8.7](https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.7)
- [https://wiki.zimbra.com/wiki/Zimbra\_Security\_Advisories](https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories)
- [https://www.securify.nl/advisory/SFY20180101/cross-site-scripting-vulnerability-in-zimbra-collaboration-suite-due-to-the-way-it-handles-attachment-links.html](https://www.securify.nl/advisory/SFY20180101/cross-site-scripting-vulnerability-in-zimbra-collaboration-suite-due-to-the-way-it-handles-attachment-links.html)
- [http://www.securityfocus.com/archive/1/541891/100/0/threaded](http://www.securityfocus.com/archive/1/541891/100/0/threaded)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2018-6882 · Markdown: https://rewindex.com/cve/CVE-2018-6882.md · JSON: https://rewindex.com/api/v1/cves/CVE-2018-6882 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:44:55.079Z