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CVE Record

CVE-2023-48432: An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15, 9.0, and 10.0.

An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15, 9.0, and 10.0. XSS, with resultant session stealing, can occur via JavaScript code in a link (for a webmail redirection endpoint) within en email message, e.g., if a victim clicks on that link within Zimbra webmail.

MediumCVSS 6.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a Zimbra webmail cross-site scripting issue. A malicious email link to a webmail redirection endpoint could run JavaScript when clicked inside Zimbra, potentially stealing the user’s session. It requires user interaction, but successful abuse could expose mailbox access and actions under the victim’s session.

Executive priority

Treat this as a medium-priority email platform risk. It is not listed as known exploited in the provided data, but session theft from webmail can create meaningful business exposure. Confirm Zimbra versions and apply vendor guidance promptly.

Technical view

CVE-2023-48432 is CWE-79 XSS in Zimbra Collaboration 8.8.15, 9.0, and 10.0. The CVSS 3.1 score is 6.1, with network attack vector, low complexity, no privileges required, and required user interaction. The source bundle does not name a specific fixed build.

Likely exposure

Organizations running Zimbra Collaboration 8.8.15, 9.0, or 10.0 webmail are potentially exposed, especially where users read untrusted email in the Zimbra web interface. Exposure depends on exact patch level and vendor advisory status, which are not detailed in the source bundle.

Exploitation context

The CVE description says exploitation depends on a victim clicking a link inside Zimbra webmail. CISA KEV status is false in the bundle, and no cited source here states active exploitation. The impact is primarily session theft with confidentiality and integrity consequences.

Researcher notes

The public bundle provides the vulnerability class, affected major versions, CVSS vector, and user-click condition, but not a patch identifier or detailed vulnerable endpoint behavior. Avoid assuming exploit maturity or fixed releases beyond Zimbra’s advisory pages.

Mitigation direction

  • Review Zimbra Security Advisories for the fixed release or supported mitigation.
  • Apply vendor-provided updates or configuration guidance for affected ZCS versions.
  • Prioritize protection for externally accessible Zimbra webmail deployments.
  • Warn users about suspicious links opened inside Zimbra webmail.
  • Monitor for unusual session activity or mailbox access after suspicious clicks.

Validation and detection

  • Inventory Zimbra Collaboration versions and patch levels across all deployments.
  • Compare installed versions with Zimbra Security Advisories for CVE-2023-48432.
  • Confirm whether affected webmail interfaces are internet-accessible.
  • Review security logs for abnormal sessions following suspicious email-link activity.
  • After vendor remediation, verify webmail link handling no longer permits script execution.
Prepared
Confidence
medium
Sources
5

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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-79: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2023-48432 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.1 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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.

1CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
6.1CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.1Medium
CVSS 3.1 vector shape for CVE-2023-48432Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

CWE-79

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