CVE-2024-45515
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 · uneditedAn issue was discovered in Zimbra Collaboration (ZCS) through 10.1. A Cross-Site Scripting (XSS) vulnerability exists in Zimbra webmail due to insufficient validation of the content type metadata when importing files into the briefcase. Attackers can exploit this issue by crafting a file with manipulated metadata, allowing them to bypass content type checks and execute arbitrary JavaScript within the victim's session.
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 stored Cross-Site Scripting vulnerability exists in Zimbra Collaboration Suite (up to version 10.1) where the briefcase file import function fails to properly validate content-type metadata. Attackers can upload files with manipulated content-type headers to bypass security checks, causing arbitrary JavaScript to execute in the context of other users' sessions when the malicious files are accessed.
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<= 10.1.0CVSS 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.
-
Check Zimbra Collaboration versionRun 'zmcontrol -v' or check '/opt/zimbra/.version' to determine the installed Zimbra version. Compare against the affected range: <= 10.1.0Affected if The installed version is 10.1.0 or any version below 10.1.0
-
Verify Briefcase module is enabledLog into Zimbra admin console and navigate to the Zimbra Collaboration features configuration, or run 'zmprov gs $(hostname) zimbraFeatureBriefcaseEnabled' to check if Briefcase is enabled for the serverAffected if Briefcase feature is enabled (this is the vulnerable component)
-
Confirm user upload permissions existCheck if any user accounts or COS (Class of Service) have the ability to upload files to Briefcase by examining 'zmprov gc <cosname> zimbraBriefcaseUploadEnabled' or reviewing user role assignments in admin consoleAffected if Users have upload permissions to Briefcase (this provides the attack vector)
-
Inspect recent briefcase uploads for anomaliesUse Zimbra's search functionality or query the database for recently uploaded files in Briefcase. Examine file metadata: compare content-type header against actual file signature (magic bytes) using 'file --mime-type <filename>'Affected if Files exist with mismatched content-type headers (e.g., a .js file disguised as an image)
A user is affected if they run Zimbra Collaboration version 10.1.0 or below, have Briefcase enabled, and allow file uploads - especially if files with suspicious content-type mismatches are present in the system.
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.
From vendor dataImplement strict content-type validation on the server side by verifying MIME types against file signatures (magic bytes) and rejecting any discrepancies. Additionally, apply output encoding when rendering file metadata in the web interface to prevent XSS execution.
- Consultation3.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,512.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-45515 — 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-2024-45515 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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