How severe is CVE-2019-9147?

CVE-2019-9147 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2019-9147 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-9147?

CVE-2019-9147 affects Mailvelope. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-9147?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-9147 published?

CVE-2019-9147 was published on 2019-07-09 and last updated on 2026-06-17.

CVE-2019-9147

CVE-2019-9147 is a medium-severity vulnerability in Mailvelope with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1021.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.3
EPSS exploit prediction: 1% (70th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1021
Affected product: Mailvelope
Published: 2019-07-09
Last modified: 2026-06-17

Description

Mailvelope prior to 3.1.0 is vulnerable to a clickjacking attack against the settings page. As the settings page is intended to be accessible from web applications, the browser's extension isolation mechanisms are disabled (web_accessible_resources). Mailvelope implements additional measures to prevent web applications from directly embedding the settings page, but this mechanism can be bypassed.

Frequently asked questions

What is CVE-2019-9147?: Mailvelope prior to 3.1.0 is vulnerable to a clickjacking attack against the settings page. As the settings page is intended to be accessible from web applications, the browser's extension isolation mechanisms are disabled (web_accessible_resources). Mailvelope implements additional measures to prevent web applications from directly embedding the settings page, but this mechanism can be bypassed.
How severe is CVE-2019-9147?: CVE-2019-9147 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2019-9147 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (70th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-9147?: CVE-2019-9147 affects Mailvelope. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-9147?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-9147 published?: CVE-2019-9147 was published on 2019-07-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mailvelope:mailvelope:*:*:*:*:*:*:*:*

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