CVE-2018-6882
Cross-site Scripting — is CVE-2018-6882real, exploitable, or a false positive? Here's the community ground truth.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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.
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Community ground truth
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Practitioners rate this higher than its CVSS — treat with extra caution.
Field notes & remediation
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- 0
Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability — Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability that might allow remote attackers to inject arbitrary web script or HTML. Listed in the CISA KEV catalog (added 2022-04-19) — confirmed exploited in the wild, not theoretical. It is linked to known ransomware campaigns. FIRST EPSS puts the chance of exploitation in the next 30 days at ~24%. Treat it as real and prioritize remediation over triage.
- 0
Required action for Synacor Zimbra Collaboration Suite (ZCS): Apply updates per vendor instructions. CISA set a federal remediation due date of 2022-05-10. After patching, verify the vulnerable path is no longer reachable before closing the finding.
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