CVE-2019-20849
CVE-2019-20849 is a medium-severity vulnerability in Mattermost Mattermost Mobile with a CVSS 3.x base score of 5.3. 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-459.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- CVSS v2: 5.0
- EPSS exploit prediction: 1% (55th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-459
- Affected product: Mattermost Mattermost Mobile
- Published:
- Last modified:
Description
An issue was discovered in Mattermost Mobile Apps before 1.26.0. Cookie data can persist on a device after a logout.
Frequently asked questions
- What is CVE-2019-20849?
- An issue was discovered in Mattermost Mobile Apps before 1.26.0. Cookie data can persist on a device after a logout.
- How severe is CVE-2019-20849?
- CVE-2019-20849 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
- Is CVE-2019-20849 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2019-20849?
- CVE-2019-20849 affects Mattermost Mattermost Mobile. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2019-20849?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2019-20849 published?
- CVE-2019-20849 was published on 2020-06-19 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:mattermost:mattermost_mobile:*:*:*:*:*:*:*:*
More vulnerabilities in Mattermost Mattermost Mobile
- CVE-2019-20852 — High (CVSS 7.5): An issue was discovered in Mattermost Mobile Apps before 1.26.0. Local logging is not blocked for sensitive information…
- CVE-2020-14451 — High (CVSS 7.5): An issue was discovered in Mattermost Mobile Apps before 1.29.0. The iOS app allowed Single Sign-On cookies and Local…
- CVE-2020-14449 — High (CVSS 7.5): An issue was discovered in Mattermost Mobile Apps before 1.30.0. Authorization tokens can sometimes be disclosed to…
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- CVE-2025-20630 — Medium (CVSS 6.5): Mattermost Mobile versions <=2.22.0 fail to properly handle posts with attachments containing fields that cannot be…
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