Is CVE-2019-20844 in the CISA KEV catalog?

No. CVE-2019-20844 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-20844?

CVE-2019-20844 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2019-20844?

CVE-2019-20844 has an EPSS score of 0.43% (35th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-20844?

Upgrade mattermost server to 5.17.2 or later.

CVE & CISA-KEV Catalog

CVE-2019-20844

MEDIUM

6.5

CVSS v3

NVD

Description

An issue was discovered in Mattermost Server before 5.18.0, 5.17.2, 5.16.4, 5.15.4, and 5.9.7. An attacker can spoof a direct-message channel by changing the type of a channel.

CWE-924

How to fix

Remediation Available

mattermost serverNVD

Affected:>= 5.17.0, < 5.17.2Fixed in:5.17.2CVE-2019-20844derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Exploit Intelligence

0.43%probability of exploitation in 30 days

35thpercentile

Low risk: more likely to be exploited than 35% of all known CVEs.

References

Vendor Advisory1

mattermost.com

Related Vulnerabilities

Other CWE-924 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-3596	Critical	9.0	15%	-	Fix
CVE-2018-14526	Medium	6.5	1.5%	-	Fix
CVE-2021-21390	Medium	6.5	0.9%	-	Fix
CVE-2022-3166	High	7.5	0.7%	-	-
CVE-2021-34793	High	8.6	0.6%	-	Fix
CVE-2021-3716	Low	3.1	0.6%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.