CVE-2026-6341Disclosure(mattermost / mattermost_server)

LOWCVSS 4.3 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Mattermost Plugins versions <=11.5 11.1.5 10.13.11 11.3.4.0 fail to have API-level checks on which groups the user can create issues or attach comments to which allows a user that is member of multiple groups to create issues to a locked group via direct API requests. Mattermost Advisory ID: MMSA-2026-00602

0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-863

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • mattermost_server

Threat summary

  • 2 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • General: 1 classified signal
  • 2 total mentions across 1 day

Affected systems

Vendors
Products
mattermost_server

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-05-18: 2Technical Details · 2026-05-18: 105-18
Signal classification2 categories
Disclosure
150.0%
General
150.0%
Referenced assets2 URLs
Full discourse2 posts
  • CVEarity@CVEarity
    Disclosure

    ⚡ New CVE Alert: CVE-2026-6341 📊 Severity: 4.3 🚨 Risk Level: Medium 🧩 Affects: Multiple / Unspecified Products Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-6341 #CVE-2026-6341 #CVE #Medium  #CyberSecurity #InfoSec https://t.co/Yw4fe2ajTn

    Post summary

    An introductory alert announcing CVE-2026-6341 with medium severity, but lacking technical details or mitigation guidance.

    0000051
    160 followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    General

    CVE-2026-6341 Unauthorized Issue Creation in Mattermost Plugins via Direct API Requests https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-6341

    Post summary

    The snippet announces CVE‑2026‑6341: an unauthorized issue‑creation vulnerability in Mattermost plugins via direct API calls, but it offers no PoC, exploit code, active exploitation evidence, or remediation details.

    0000062
    4.0K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appmattermostmattermost_server---

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