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CVE Record

CVE-2017-8783: Synacor Zimbra Collaboration Suite (ZCS) before 8.7.10 has Persistent XSS.

Synacor Zimbra Collaboration Suite (ZCS) before 8.7.10 has Persistent XSS.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2017-8783 is a persistent cross-site scripting issue in Synacor Zimbra Collaboration Suite before 8.7.10. In business terms, vulnerable webmail or collaboration systems could store malicious script content that later runs in another user's browser. The source bundle does not provide CVSS, exploit details, or affected configuration specifics.

Executive priority

Treat this as a necessary legacy Zimbra hygiene item. It is not source-confirmed as actively exploited, but persistent XSS in collaboration software can affect user trust, mail security, and authenticated browser sessions.

Technical view

The CVE record states Zimbra Collaboration Suite before 8.7.10 has persistent XSS. Persistent XSS means hostile script content may be saved server-side and executed when another user views the affected content. The bundle does not identify the exact component, input vector, privileges required, or browser/session impact.

Likely exposure

Organizations running Zimbra Collaboration Suite versions before 8.7.10 are the only clearly supported exposure group. The bundle does not identify affected editions, deployment modes, or whether internet exposure changes risk.

Exploitation context

The bundle marks KEV as false and provides no cited evidence of active exploitation. No exploit maturity, public proof-of-concept status, or attacker prerequisites are provided, so exploitation likelihood cannot be confirmed from these sources.

Researcher notes

Key missing details are component, vector, privileges, impact, and patch notes. Use the Zimbra advisory and Bugzilla references to confirm exact exposure before designing tests. Avoid assuming exploitability beyond the persistent XSS statement.

Mitigation direction

  • Identify any Zimbra Collaboration Suite deployments and their versions.
  • Upgrade systems before 8.7.10 to 8.7.10 or later, per vendor guidance.
  • Review Zimbra Security Center and advisory pages for environment-specific instructions.
  • Prioritize externally accessible or high-user-count webmail deployments.

Validation and detection

  • Confirm installed Zimbra Collaboration Suite version is 8.7.10 or later.
  • Review vendor advisory references for the linked bug IDs.
  • Check security logs for unusual stored content or suspicious webmail activity.
  • Verify no unsupported legacy Zimbra instances remain in production.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2017-8783 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
5Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.