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EspoCRM: Pre-authentication stored HTML injection in stream notification emails about email received

Type: advisorySource: Official CVE List1 source record

EspoCRM is an open source customer relationship management application. Prior to 9.3.9, an unauthenticated remote attacker can send an email to a monitored group or IMAP address, including an email-to-Case address, and place arbitrary HTML in its plain-text body. EspoCRM stores that body and renders it without escaping in Email Received stream notification emails sent to users following the related record, allowing HTML injection and, in mail clients that execute it, JavaScript execution. Earlier sanitization for Post and Mention notifications did not cover this notification path. This issue is fixed in version 9.3.9.

Announced Source revision 1
Original source ↗

CVE-2026-59994

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-59994

espocrm

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "espocrm",
    "product": "espocrm",
    "versions": [
      {
        "status": "affected",
        "version": "< 9.3.9"
      }
    ]
  }
]
Related CVEs
CVE-2026-59994

Source reference: /cveMetadata/cveId

Publisher severity

medium

Source reference: /containers/cna/metrics

Event
#42100 · Revision 1
Added to Heist Feed
Publisher date
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