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Fencer Intel
medium 6.5

CVE-2020-14460 json

An issue was discovered in Mattermost Server before 5.19.0, 5.18.1, 5.17.3, 5.16.5, and 5.9.8.

published 6y ago modified 4mo ago also BIT-mattermost-2020-14460 , EUVD-2020-6597

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

An issue was discovered in Mattermost Server before 5.19.0, 5.18.1, 5.17.3, 5.16.5, and 5.9.8. Creation of a trusted OAuth application does not always require admin privileges, aka MMSA-2020-0001.

Patch / fix

  • bitnami mattermost 5.9.8, 5.16.5, 5.17.3, 5.18.1
  • mattermost mattermost_server 5.9.8, 5.16.5, 5.17.3, 5.18.1

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Exploit prediction

0.79% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:P/A:N
OSV 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem package affected fixed in
bitnami mattermost
<5.9.8
>=5.16.0, <5.16.5
>=5.17.0, <5.17.3
>=5.18.0, <5.18.1
>=5.19.0-rc1, <=5.19.0-rc1
>=5.19.0-rc2, <=5.19.0-rc2
>=5.19.0-rc3, <=5.19.0-rc3
5.9.8
5.16.5
5.17.3
5.18.1

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.