CVE-2018-6882 kev+ ransomware in the critical feed json
Cross-site scripting (XSS) vulnerability in the ZmMailMsgView.getAttachmentLinkHtml function in Zimbra Collaboration Suite (ZCS) before 8.7…
published 2018-03-27 8 y ago modified 2026-10-01 39 d ago also EUVD-2018-18627
- cvss
- 6.1
- version 3.1, CNA
- cisa kev
- Exploited
- added 2022-04-19, used in ransomware
- epss
- 29.8%
- EPSS 29.8% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
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.
Patch / fix
cisa required action Apply updates per vendor instructions.
- synacor zimbra_collaboration_suite 8.7.0
Timeline
- Published
- Added to CISA KEV
- CISA patch deadline
- CISA SSVC: exploitation active
Known exploited
- Added
- 4 y ago
- Patch by
- 2022-05-10 (4 y ago)
- Ransomware
- Known to be used in ransomware campaigns
- Required action
- Apply updates per vendor instructions.
- Vendor, product
- Synacor, Zimbra Collaboration Suite (ZCS)
- CISA name
- Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 mo ago
Exploit prediction
29.76% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- Nuclei template Zimbra Collaboration Suite - Cross-site Scripting nuclei detection template
- securify.nl https://www.securify.nl/advisory/SFY20180101/cross-site-scripting-vulnerability-in-zimbra-collaboration-suite-due-to-the-way-it-handles-attachment-links.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| CNA | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
securify.nl
/advisory/SFY20180101/cross-site-scripting-vulnerability-in-zimbra-collaboration-suite-due-to-the-way-it-handl
exploit, third-party-advisory
-
wiki.zimbra.com
/wiki/Zimbra_Security_Advisories
vendor-advisory
-
seclists.org
/fulldisclosure/2018/Mar/52
mailing-list, third-party-advisory
-
wiki.zimbra.com
/wiki/Zimbra_Releases/8.8.7
permissions-required
-
bugzilla.zimbra.com
/show_bug.cgi?id=108786
broken-link, issue-tracking, permissions-required
-
securityfocus.com
/archive/1/541891/100/0/threaded
mailing-list, broken-link, third-party-advisory, vdb-entry
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-6882
government-resource, us-government-resource
Sources
- CVE List CVE-2018-6882
- NVD CVE-2018-6882
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.