CVE-2023-27266— Disclosure of team owner email address when when accessing the teams API
Quick assessment
Affected
Mattermost Mattermost
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Mattermost是美国Mattermost公司的一个开源协作平台。 Mattermost存在安全漏洞，该漏洞源于允许具有团队管理员权限的攻击者在响应中了解团队所有者的电子邮件地址。
Possible ATT&CK Techniques 1 AI
T1005 · Data from Local System
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2023-27266
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Disclosure of team owner email address when when accessing the teams API
Source: CVE Program / CVE List V5
Vulnerability Description
Mattermost fails to honor the ShowEmailAddress setting when constructing a response to the /api/v4/users/me/teams API endpoint, allowing an attacker with team admin privileges to learn the team owner's email address in the response.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Mattermost 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mattermost是美国Mattermost公司的一个开源协作平台。 Mattermost存在安全漏洞，该漏洞源于允许具有团队管理员权限的攻击者在响应中了解团队所有者的电子邮件地址。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Mattermost | Mattermost | 5.12.0 ~ 7.7.0 | - |
|
II. Public POCs for CVE-2023-27266
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2023-27266
请登录查看更多情报信息。
Other References for CVE-2023-27266 (1)
Same Patch Batch · Mattermost · 2023-02-27 · 4 CVEs total
| CVE-2023-27264 | 7.1 HIGH | IDOR: Updating a playbook via the Playbooks API |
| CVE-2023-27263 | 4.3 MEDIUM | IDOR: Accessing playbook runs via the Playbooks Runs API |
| CVE-2023-27265 | 2.7 LOW | Disclosure of team owner email address when regenerating Invite ID |
IV. Related Vulnerabilities
Same product: Mattermost
-
CVE-2026-18799
Mattermost Server fails to restrict Slack import account bin -
CVE-2026-16251
Mattermost local image proxy allows server memory exhaustion -
CVE-2026-18256
Private team metadata disclosure via the team search API -
CVE-2026-18223
Mattermost invitation tokens not bound to invited email addr -
CVE-2026-19076
Mattermost fails to reject OAuth application sessions in acc
Same vendor: Mattermost
-
CVE-2026-18799
Mattermost Server fails to restrict Slack import account bin -
CVE-2026-16251
Mattermost local image proxy allows server memory exhaustion -
CVE-2026-18256
Private team metadata disclosure via the team search API -
CVE-2026-18223
Mattermost invitation tokens not bound to invited email addr -
CVE-2026-19076
Mattermost fails to reject OAuth application sessions in acc
Same weakness: CWE-200
-
CVE-2026-112954
ApostropheCMS: Unauthenticated publicApiProjection bypass vi -
CVE-2026-112953
ApostropheCMS: Exposure of Sensitive Information via predict -
CVE-2026-112952
ApostropheCMS: POST /api/v1/@apostrophecms/doc/slugTaken dis -
CVE-2026-112948
Vitest: Servers misapply `server.fs.deny`, serving `.env`, p -
CVE-2026-112781
Grav 2.0.0 before 2.2.2 Information Disclosure via Form conf
V. Comments for CVE-2023-27266
No comments yet