CVE Explorer
CVE-2026-8823
Mattermost versions 11.7.x <= 11.7.0, 10.11.x <= 10.11.17 fail to validate bot targets when demoting users to guests which allows a lower-privileged administrator to degrade arbitrary bot accounts via the standard demote-user API.. Mattermost Advisory ID: MMSA-2026-00669
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"Mattermost","vendor":"Mattermost","versions":[{"lessThanOrEqual":"11.7.0","status":"affected","version":"11.7.0","versionType":"semver"},{"lessThanOrEqual":"10.11.17","status":"affected","version":"10.11.0","versionType":"semver"},{"status":"unaffected","version":"11.8.0"},{"status":"unaffected","version":"11.7.1"},{"status":"unaffected","version":"10.11.18"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:9f79d24794a616bf27be977fce29f2674e3daa586a9a2415fcf6171e7e113894 · sha256:78ef70d896a092a4… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":3.8,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:9f79d24794a616bf27be977fce29f2674e3daa586a9a2415fcf6171e7e113894 · sha256:78ef70d896a092a4… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-863","description":"CWE-863: Incorrect Authorization","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:9f79d24794a616bf27be977fce29f2674e3daa586a9a2415fcf6171e7e113894 · sha256:78ef70d896a092a4… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"MMSA-2026-00669","tags":["vendor-advisory"],"url":"https://mattermost.com/security-updates"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:9f79d24794a616bf27be977fce29f2674e3daa586a9a2415fcf6171e7e113894 · sha256:78ef70d896a092a4… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.