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CVE Record

CVE-2019-9150: Mailvelope prior to 3.3.0 does not require user interaction to import public keys shown on web page.

Mailvelope prior to 3.3.0 does not require user interaction to import public keys shown on web page. This functionality can be tricked to either hide a key import from the user or obscure which key was imported.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

Mailvelope before 3.3.0 could import a public encryption key from a web page without clear user approval. A deceptive page could hide the import or obscure which key was added, creating risk that users encrypt mail to an attacker-controlled or unintended key.

Executive priority

Treat this as a targeted trust-integrity risk for teams using Mailvelope for sensitive email. Prioritize confirming extension versions and retiring pre-3.3.0 installs, but do not treat it as confirmed active exploitation based on the supplied evidence.

Technical view

The issue affects Mailvelope prior to 3.3.0. The vulnerable behavior is automatic public-key import from web-page content without required user interaction, allowing UI manipulation around key-import visibility and key identity. Source data provides no CVSS score, CWE, CPE, or confirmed exploit activity.

Likely exposure

Exposure is most likely where users run Mailvelope versions earlier than 3.3.0, especially in browser-based OpenPGP/webmail workflows. The source bundle does not provide CPEs, affected browser platforms, or enterprise deployment details.

Exploitation context

CISA KEV status is false, and the provided sources do not claim active exploitation. The described abuse requires a user encountering a web page that presents or manipulates public-key import behavior, but the sources do not provide exploitation prevalence.

Researcher notes

The available record is sparse: no CVSS, CWE, CPE, or detailed affected-platform matrix is provided. Focus validation on version inventory, extension-management controls, and whether users depend on Mailvelope-imported keys for high-trust communication.

Mitigation direction

  • Upgrade Mailvelope to version 3.3.0 or later per the referenced changelog.
  • Review Mailvelope vendor guidance and browser extension release notes for supported update paths.
  • Remove or quarantine obsolete Mailvelope extension versions from managed browsers.
  • Ask users to verify public keys through trusted channels before sensitive encrypted mail.

Validation and detection

  • Inventory browser extensions and identify Mailvelope versions below 3.3.0.
  • Confirm managed browsers receive current Mailvelope extension updates.
  • Review keyrings for unexpected public keys added around suspicious browsing events.
  • Check helpdesk or security reports for unexpected encryption-recipient changes.
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

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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
4Source 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.