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CVE Record

CVE-2026-32852: MailEnable < 10.55 Reflected XSS via FreeBusy.aspx StartDate Parameter

MailEnable versions prior to 10.55 contain a reflected cross-site scripting vulnerability in the webmail interface that allows remote attackers to execute arbitrary JavaScript in a victim's browser by crafting a malicious URL. Attackers can inject malicious code through the StartDate parameter in the FreeBusy.aspx form, which is not properly sanitized before being embedded into dynamically generated JavaScript.

MediumCVSS 5.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2026-32852 is a reflected cross-site scripting issue in MailEnable webmail before version 10.55. A victim must open a crafted URL, after which attacker-controlled JavaScript may run in that victim's browser session.

Executive priority

Treat this as a moderate webmail risk, not an emergency absent exploitation evidence. Patch during the next appropriate maintenance window, faster for internet-facing or high-value mail environments.

Technical view

The issue is CWE-79 in FreeBusy.aspx, where the StartDate parameter is not properly sanitized before inclusion in dynamically generated JavaScript. CVSS v4.0 is 5.1 with network attack vector, low complexity, no privileges required, and user interaction required.

Likely exposure

Organizations are exposed if they run MailEnable webmail versions earlier than 10.55, especially where webmail is internet-accessible. The provided data does not identify specific editions or CPEs beyond MailEnable generally.

Exploitation context

The bundle references public technical and third-party advisories, but KEV is false and no cited source states active exploitation. Practical abuse requires convincing a user to visit a malicious URL.

Researcher notes

The main uncertainty is product/version granularity: the bundle says MailEnable before 10.55, but affected CPE data is absent. Avoid assuming exploitation in the wild; validate exposure through version checks and route availability.

Mitigation direction

  • Upgrade MailEnable to version 10.55 or later using vendor guidance.
  • Review MailEnable release notes and advisory details before change deployment.
  • Restrict external access to webmail where business requirements allow.
  • Educate webmail users to avoid unexpected calendar or availability links.

Validation and detection

  • Inventory MailEnable webmail instances and confirm installed versions.
  • Flag any MailEnable instance below 10.55 for remediation.
  • Check whether FreeBusy.aspx is exposed to untrusted users.
  • Run safe regression testing for StartDate handling without script payloads.
  • Monitor webmail logs for unusual FreeBusy.aspx requests.
Prepared
Confidence
high
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

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.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-32852 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
5.1 (4.0)
Known Exploited
No
Published

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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
3Timeline events
1ADP providers
6Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: noTechnical Impact: partial

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
5.1CVSS 4.0MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N——VulnCheck

Vulnerability scoring details

Base CVSS 4.0 score

5.1Medium
CVSS 4.0 vector shape for CVE-2026-32852Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
MailEnableMailEnable0unaffected
Weakness

CWE details

CWE-79

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