CVE-2024-36255— Post actions can run playbook checklist task commands
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I. Basic Information for CVE-2024-36255
Vulnerability Information
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Vulnerability Title
Post actions can run playbook checklist task commands
Source: NVD (National Vulnerability Database)
Vulnerability Description
Mattermost versions 9.5.x <= 9.5.3, 9.6.x <= 9.6.1 and 8.1.x <= 8.1.12 fail to perform proper input validation on post actions which allows an attacker to run a playbook checklist task command as another user via creating and sharing a deceptive post action that unexpectedly runs a slash command in some arbitrary channel.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨站请求伪造(CSRF)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mattermost Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mattermost Server是美国Mattermost公司的一套开源的消息传递平台。 Mattermost Server存在安全漏洞，该漏洞源于无法对后期操作执行正确的输入验证，导致攻击者能以其他用户的身份执行斜杠命令。受影响版本如下：9.5.3及之前的9.5.x版本；9.6.1及之前的9.6.x版本；8.1.12之前的8.1.x版本。
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 | 9.5.0 ~ 9.5.3 | - |
II. Public POCs for CVE-2024-36255
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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Same Patch Batch · Mattermost · 2024-05-26 · 9 CVEs total
| CVE-2024-32045 | 5.9 MEDIUM | Playbook run link to private channel grants channel access |
| CVE-2024-29215 | 4.3 MEDIUM | Slash commands run in channel without channel membership via playbook task commands |
| CVE-2024-31859 | 4.3 MEDIUM | Member promoted to channel admin via playbooks run linking to channel |
| CVE-2024-5270 | 4.3 MEDIUM | SAML to email switch possible when email signin is disabled |
| CVE-2024-5272 | 4.3 MEDIUM | Run Details leak to guest via webhook event "custom_playbooks_playbook_run_updated" |
| CVE-2024-34152 | 4.3 MEDIUM | Playbook Run Metadata leak to Guest |
| CVE-2024-34029 | 4.3 MEDIUM | AD/LDAP Group Members Leak |
| CVE-2024-36241 | 3.1 LOW | /playbook add slash command allows viewing arbitrary post contents |
IV. Related Vulnerabilities
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Unbounded Request Body Read in MS Teams Plugin {{/changes}} - CVE-2026-21388
Unbounded Request Body Read in MS Teams Plugin {{/lifecycle}
Same vendor: Mattermost
- CVE-2026-3590
Race Condition in Guest Magic Link Authentication Allows Tok - CVE-2026-28741
CSRF Protection Bypass Allows Updating a User's Authenticati - CVE-2026-27769
Connected Workspaces: Malicious remote server can manipulate - CVE-2026-24661
Unbounded Request Body Read in MS Teams Plugin {{/changes}} - CVE-2026-21388
Unbounded Request Body Read in MS Teams Plugin {{/lifecycle}
Same weakness: CWE-352
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OpenCart 3.0.36 Account Takeover via Cross Site Request Forg - CVE-2022-50955
WordPress Plugin Curtain 1.0.2 Cross-site Request Forgery - CVE-2026-8194
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Emlog: Cross-Site Request Forgery in Admin Functions
V. Comments for CVE-2024-36255
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