CVE-2018-6882Cross-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…
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It affects synacor zimbra_collaboration_suite. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Apr 19, 2022; federal agencies had to remediate by May 10, 2022, and it is known to be used in ransomware. Treat that date as your deadline.
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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.
- CVSS
- 6.1 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Added to CISA KEV Apr 19, 2022; federal remediation due May 10, 2022; known ransomware useApply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 29.76% (percentile 98)
- Assigned by
- mitre
- NVD analysis
- Analyzed
- Record last updated
- Oct 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
synacor zimbra_collaboration_suite synacor:zimbra_collaboration_suite | before 8.7.0; 8.7.0; 8.8.0; 8.8.1; 8.8.2; 8.8.3; 8.8.4; 8.8.5; and 1 more ranges | NVD |
References
- http://seclists.org/fulldisclosure/2018/Mar/52mailing-list, x-refsource-fulldisc, third-party-advisory
- https://www.securify.nl/advisory/SFY20180101/cross-site-scripting-vulnerability-in-zimbra-collaboration-suite-due-to-the-way-it-handles-attachment-links.htmlx-refsource-misc, exploit, third-party-advisory
- https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.7x-refsource-confirm, permissions-required
- https://bugzilla.zimbra.com/show_bug.cgi?id=108786x-refsource-confirm, broken-link, issue-tracking, permissions-required
- http://www.securityfocus.com/archive/1/541891/100/0/threadedmailing-list, x-refsource-bugtraq, broken-link, third-party-advisory, vdb-entry
- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisoriesx-refsource-confirm, vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-6882us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.