How severe is CVE-2019-20852?

CVE-2019-20852 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2019-20852 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-20852?

CVE-2019-20852 affects Mattermost Mattermost Mobile. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-20852?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-20852 published?

CVE-2019-20852 was published on 2020-06-19 and last updated on 2026-06-17.

CVE-2019-20852

CVE-2019-20852 is a high-severity vulnerability in Mattermost Mattermost Mobile with a CVSS 3.x base score of 7.5. 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-532.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-532
Affected product: Mattermost Mattermost Mobile
Published: 2020-06-19
Last modified: 2026-06-17

Description

An issue was discovered in Mattermost Mobile Apps before 1.26.0. Local logging is not blocked for sensitive information (e.g., server addresses or message content).

Frequently asked questions

What is CVE-2019-20852?: An issue was discovered in Mattermost Mobile Apps before 1.26.0. Local logging is not blocked for sensitive information (e.g., server addresses or message content).
How severe is CVE-2019-20852?: CVE-2019-20852 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2019-20852 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-20852?: CVE-2019-20852 affects Mattermost Mattermost Mobile. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-20852?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-20852 published?: CVE-2019-20852 was published on 2020-06-19 and last updated on 2026-06-17.

References

https://mattermost.com/security-updates/

Affected products (1)

cpe:2.3:a:mattermost:mattermost_mobile:*:*:*:*:*:*:*:*

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