Known exploited vulnerability
CVE-2018-6882
The short answer
CVE-2018-6882 affects n/a n/a and is rated medium (CVSS 6.1). CISA added it to the Known Exploited Vulnerabilities catalog on 2022-04-19: attackers are using it, so patch it first.
What it is
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.
Weakness: CWE-79.
Severity
6.1 medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Exploited (CISA KEV)
Yes, since Apr 19, 2022
Federal due date May 10, 2022
EPSS, next 30 days
30%
Higher than 98% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality impact
- Low
- Integrity impact
- Low
- Availability impact
- None
What CISA says to do
Apply updates per vendor instructions.
Affected products
n/a. NVD's record lists the exact affected versions.
References
- bugzilla.zimbra.com/show_bug.cgi?id=108786 Broken LinkIssue TrackingPermissions Required
- wiki.zimbra.com/wiki/Zimbra_Releases/8.8.7 Permissions Required
- wiki.zimbra.com/wiki/Zimbra_Security_Advisories Vendor Advisory
- www.securify.nl/advisory/SFY20180101/cross-site-scripting-vulnerability-in-zimbra-collaboration-suite-due-to-the-way-it-handles-attachment-links.html ExploitThird Party Advisory
- bugzilla.zimbra.com/show_bug.cgi?id=108786 Broken LinkIssue TrackingPermissions Required
- wiki.zimbra.com/wiki/Zimbra_Releases/8.8.7 Permissions Required
- wiki.zimbra.com/wiki/Zimbra_Security_Advisories Vendor Advisory
- www.securify.nl/advisory/SFY20180101/cross-site-scripting-vulnerability-in-zimbra-collaboration-suite-due-to-the-way-it-handles-attachment-links.html ExploitThird Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-6882 US Government Resource
Questions
Is CVE-2018-6882 being exploited?
Yes. CISA added CVE-2018-6882 to its Known Exploited Vulnerabilities catalog on 2022-04-19, with a federal remediation due date of 2022-05-10. CISA lists it as used in ransomware campaigns.
How do I fix CVE-2018-6882?
CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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