02 Records
FEED: ACQUIRING
01 RecordSTATE: PUBLISHED
02 Description
CNA: MattermostOne-Click Mattermost Account Takeover via Poisoned RelayState SAML Parameter
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 ImpacttotalSuccessful exploitation gives total 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
- 0.17% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Ranks above 7.0% of scored records. A rank, not a probability.
- NVD base score
- 5.4 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
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
- 2025-09-15 10:28Z11 MO AGO
- Last updated
- 2025-09-15 12:06Z11 MO AGO
- Reserved
- 2025-08-15
- Assigning CNA
- Mattermost
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.6)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L
- Weaknesses
- CWE-601URL Redirection to Untrusted Site ('Open Redirect')Base
- Data version
- 5.1
- Document digest
- d3368b73543af071c1b54d4c466939ec0ea4e2119486f466fa4a6fc5b1c4d2d0
05 Affected products
PAIRS: 1VendorProductVersionsPlatforms
MattermostMattermost10.10.0 to 10.10.1, 10.5.0 to 10.5.9, 10.9.0 to 10.9.4— SRC: CNA
Update Mattermost to versions 10.11.0, 10.10.2, 10.5.10, 10.9.5 or higher.