CVE-2024-34152· NVD / CVE Program· CNA Mattermost

Playbook Run Metadata leak to Guest

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 access control which allows a guest to get the metadata of a public playbook run that linked to the channel they are guest via sending an RHSRuns GraphQL query request to the server

MediumCVSS 4.3 · v3.1—No exploit No fix recorded

Broken access control (IDOR)

Published: May 26, 2024
Updated: Jun 17, 2026
EPSS: 0.3% · 16th percentile
CWE: CWE-284

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Action score

Monitor

Low priority for now.

CVSS: 17 / 40 · 4.3 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.3%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · Mattermost: 4.3; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Affected systems

Vendor	Product	CPE
mattermost	mattermost server	cpe:2.3:a:mattermost:mattermost_server

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

mattermost mattermost server8.1.0 and later · before 8.1.13
mattermost mattermost server9.5.0 and later · before 9.5.4
mattermost mattermost server9.6.0 and later · before 9.6.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Mattermost). Independent of NVD's CPE analysis and usually ahead of it.

Mattermost Mattermost
- 9.7.0, 9.5.4, 9.6.2, 8.1.13not affected
- 9.5.0 and later · up to and including 9.5.3affected · semver
- 9.6.0 and later · up to and including 9.6.1affected · semver
- 8.1.0 and later · up to and including 8.1.12affected · semver

Same product

mattermost: all records

Other highest-scoring records for the same primary product.

CVE-2026-4858Path traversal in integration action URL leading to arbitrary API execution via system admin’s auth token.
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CVE-2025-12421Account Takeover via Code Exchange Endpoint
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CVE-2025-12419Account takeover on OAuth/OpenID-enabled servers
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CVE-2025-4981Path Traversal Leading to RCE by Any Authenticated Mattermost User
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CVE-2023-6458Client side path traversal due to lack of route parameters validation
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CVE-2017-18920An issue was discovered in Mattermost Server before 3.6.2.
39Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

BhaRat (hackit_bharat)finder

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2024-4114467 days apartMalicious remote can create/update/delete arbitrary posts in arbitrary channels
28Monitor
CVE-2024-244751 days apartMattermost versions 8.1.x before 8.1.11, 9.3.x before 9.3.3, 9.4.x before 9.4.4, and 9.5.x before 9.5.2 fail to authenticate the source of c
26Monitor
CVE-2024-318590 days apartMember promoted to channel admin via playbooks run linking to channel
25Monitor
CVE-2024-320450 days apartPlaybook run link to private channel grants channel access
23Monitor
CVE-2024-3983767 days apartMalicious remote can create arbitrary channels
21Monitor
CVE-2024-42406123 days apartUnauthorized access on archived channels
21Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope