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CVE-2024-2445

Reflected XSS in Mattermost Jira plugin

MEDIUM
6.1
CVSS Score
Published: March 15, 2024 at 09:19 AM UTC
Updated: June 17, 2026 at 07:24 AM UTC
2 products affected across 1 vendorMattermost ServerMattermost

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Mattermost Jira plugin versions shipped with Mattermost versions 8.1.x before 8.1.10, 9.2.x before 9.2.6, 9.3.x before 9.3.2, and 9.4.x before 9.4.3 fail to escape user-controlled outputs when generating HTML pages, which allows an attacker to perform reflected cross-site scripting attacks against the users of the Mattermost server.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Mattermost Server· Mattermost
95%
8.1.0 ≤ v < 8.1.109.2.0 ≤ v < 9.2.69.3.0 ≤ v < 9.3.29.4.0 ≤ v < 9.4.3
Affected range stops below 8.1.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.2.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.3.2, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.4.3, so it looks safe — our inference, not a vendor statement
Mattermost· Mattermost
60%
8.1.0 ≤ v ≤ 8.1.99.2.0 ≤ v ≤ 9.2.59.3.0 ≤ v ≤ 9.3.19.4.0 ≤ v ≤ 9.4.28.1.09.2.09.3.09.4.0
Vendor states this is fixed in 8.1.10 (unaffected)
Vendor states this is fixed in 9.2.6 (unaffected)
Vendor states this is fixed in 9.3.2 (unaffected)
Vendor states this is fixed in 9.4.3 (unaffected)
Vendor states this is fixed in 9.5.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: [email protected]
https://mattermost.com/security-updates

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUMMattermost
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-74CWE-79

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