Mattermost Server up to 4.10.5/5.5.2/5.6.3/5.7.0 API Permission permission assignment
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.1 | $0-$5k | 0.00 |
A vulnerability, which was classified as critical, was found in Mattermost Server up to 4.10.5/5.5.2/5.6.3/5.7.0. This affects an unknown function of the component API Permission Handler. The manipulation with an unknown input leads to a permission assignment vulnerability. CWE is classifying the issue as CWE-732. The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:
An issue was discovered in Mattermost Server before 5.7.1, 5.6.4, 5.5.3, and 4.10.6. It does not honor flags API permissions when deciding whether a user can receive intra-team posts.
The weakness was disclosed 06/19/2020 (Website). The advisory is shared at mattermost.com. This vulnerability is uniquely identified as CVE-2019-20887 since 06/19/2020. The exploitability is told to be easy. It is possible to initiate the attack remotely. The successful exploitation requires a authentication. Neither technical details nor an exploit are publicly available.
Upgrading to version 4.10.6, 5.5.3, 5.6.4 or 5.7.1 eliminates this vulnerability.
The entries 156956, 156957, 156958 and 156959 are pretty similar.
Product
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 5.3VulDB Meta Temp Score: 5.2
VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 4.3
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
---|---|---|---|---|---|
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
---|---|---|---|---|---|
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Permission assignmentCWE: CWE-732 / CWE-275 / CWE-266
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: Mattermost Server 4.10.6/5.5.3/5.6.4/5.7.1
Timeline
06/19/2020 🔍06/19/2020 🔍
06/20/2020 🔍
10/25/2020 🔍
Sources
Advisory: mattermost.comStatus: Not defined
Confirmation: 🔍
CVE: CVE-2019-20887 (🔍)
See also: 🔍
Entry
Created: 06/20/2020 08:03Updated: 10/25/2020 19:27
Changes: 06/20/2020 08:03 (39), 06/20/2020 08:08 (17), 10/25/2020 19:27 (1)
Complete: 🔍
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