What is CVE-2019-20848?

CVE-2019-20848 is a high-severity vulnerability in Mattermost Mobile, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2020-06-19.

How severe is CVE-2019-20848?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Mattermost Mobile

CVE-2019-20848

An issue was discovered in Mattermost Mobile Apps before 1.26.0. The Quick Reply feature mishandles crafted replies.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2020-06-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.009 (58.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Mattermost Mobile

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

mattermost.com/security-updates/ (Vendor Advisory)

Frequently asked questions

What is CVE-2019-20848?: CVE-2019-20848 is a high-severity vulnerability in Mattermost Mobile, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2020-06-19.
How severe is CVE-2019-20848?: High severity. CVSS v3 base score is 7.5 out of 10.