CVE-2023-37580
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedZimbra Collaboration (ZCS) 8 before 8.8.15 Patch 41 allows XSS in the Zimbra Classic Web Client.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceA cross-site scripting (XSS) vulnerability exists in the Zimbra Classic Web Client, allowing attackers to inject malicious scripts through unsanitized user input that executes in the browsers of other users who view the affected content.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data>= 8.8.0, < 8.8.15= 8.8.15CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify ZCS installation and versionRun 'zmcontrol -v' or check /opt/zimbra/.gitdescribe to determine the installed Zimbra Collaboration Suite versionAffected if Version is 8.8.0 through 8.8.15, or specifically 8.8.15
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Confirm Classic Web Client is in useCheck if the '/zimbra/' endpoint (Classic) is accessible and enabled versus '/zimbra/h/' (Modern). Inspect the Zimbra proxy configuration or web.xml for enabled web client pathsAffected if Classic Web Client endpoint is accessible and active
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Verify patch levelCheck /opt/zimbra/jetty/webapps/zimbra/WEB-INF/classes/resources/ZsMsg.properties or examine the installed package patches via 'zmcontrol -v' output for patch 41 or laterAffected if Patch 41 or later is NOT installed on ZCS versions 8.8.0-8.8.15
A system is affected if it runs ZCS 8.8.0-8.8.15 without patch 41 and has the Classic Web Client enabled.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped8.8.15
Apply Zimbra Collaboration Suite 8.8.15 Patch 41 or later to remediate the XSS vulnerability in the Classic Web Client.
Zimbra Collaboration Suite 8.8.15 Patch 41 or later
- Identify current Zimbra Collaboration Suite version using 'zmcontrol -v' or admin console
- Download Zimbra Collaboration Suite 8.8.15 Patch 41 or later from official Zimbra repository
- Review Zimbra upgrade documentation for pre-upgrade checks (backup, dependencies)
- Execute upgrade following Zimbra standard upgrade procedure
- Verify the patch was applied successfully
- Test the Zimbra Classic Web Client to confirm XSS vulnerability is remediated
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation3.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,800.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-37580 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2023-37580 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data