02 Records
FEED: ACQUIRING
01 RecordSTATE: PUBLISHED
02 Description
CNA: MattermostMattermost versions 9.6.0, 9.5.x before 9.5.3, and 8.1.x before 8.1.12 fail to fully validate role changes, which allows an attacker authenticated as a team admin to promote guests to team admins via
03 Exploitation and scoring
SRC: CISA, FIRST, NVD, RED HAT- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.- EPSS probability
- 0.50% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Ranks above 40.5% of scored records. A rank, not a probability.
- NVD base score
- 2.7 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Low. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
SCHEMA: 5.1
- Published
- 2024-04-26 08:26Z2 YR AGO
- Last updated
- 2024-08-01 20:33Z2 YR AGO
- Reserved
- 2024-04-25
- Assigning CNA
- Mattermost
- Record state
- PUBLISHED
- Severity
- Low (CVSS 2.7)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
- Weaknesses
- CWE-284Improper Access ControlPillar
- Data version
- 5.1
- Document digest
- c93a64a65a49677c6208b0de7aad31b65f351de1926369b5b559a4651130314e
05 Affected products
PAIRS: 2VendorProductVersionsPlatforms
MattermostMattermost9.6.0, 9.5.0 to 9.5.2, 8.1.0 to 8.1.11— SRC: CNA
Update Mattermost Server to versions 9.7.0, 9.6.1, 9.5.3, 8.1.12 or higher.