CVE-2024-39836 json
Munged email address used for password resets and notifications
published 2024-08-22 2 y ago modified 2026-06-17 4 mo ago also GHSA-c6vp-jjgv-38wj , GO-2024-3096 , EUVD-2024-2555
- cvss
- 4.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 18%
- public exploits
- 0
- none known
Summary
Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0 and 9.8.x <= 9.8.2 fail to ensure that remote/synthetic users cannot create sessions or reset passwords, which allows the munged email addresses, created by shared channels, to be used to receive email notifications and to reset passwords, when they are valid, functional emails.
Patch / fix
- go github.com/mattermost/mattermost/server/v8 9.5.8, 9.8.3, 9.9.2, 9.10.1
- go github.com/mattermost/mattermost-server 9.5.8+incompatible, 9.8.3+incompatible, 9.9.2+incompatible, 9.10.1+incompatible
- Mattermost Mattermost 9.5.8, 9.8.3, 9.9.2, 9.10.1, 9.11.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 y ago
Exploit prediction
0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| GitHub | 3.1 | 4.8 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost/server/v8 | >=9.9.0, <9.9.2 >=9.5.0, <9.5.8 >=9.10.0, <9.10.1 >=9.8.0, <9.8.3 all versions |
9.9.2 9.5.8 9.10.1 9.8.3 |
| go | github.com/mattermost/mattermost-server | >=9.5.0+incompatible, <9.5.8+incompatible >=9.8.0+incompatible, <9.8.3+incompatible >=9.9.0+incompatible, <9.9.2+incompatible >=9.10.0+incompatible, <9.10.1+incompatible |
9.5.8+incompatible 9.8.3+incompatible 9.9.2+incompatible 9.10.1+incompatible |
| go | github.com/mattermost/mattermost-server/v5 | all versions |
no fix listed |
| go | github.com/mattermost/mattermost-server/v6 | all versions |
no fix listed |
Affected products
- Mattermost Mattermost
Classification
- Weakness
-
- CWE-693 Protection Mechanism Failure
References
-
mattermost.com
/security-updates
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2024-39836
advisory
-
github.com
/mattermost/mattermost
package
-
github.com
/advisories/GHSA-c6vp-jjgv-38wj
advisory
Sources
- CVE List CVE-2024-39836
- GitHub Advisory GHSA-c6vp-jjgv-38wj
- NVD CVE-2024-39836
- OSV GO-2024-3096
Fencer Vulns 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.