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CVE-2022-1337

OOM DoS in Mattermost image proxy

MEDIUM
6.5
CVSS Score
Published: April 13, 2022 at 05:06 PM UTC
Updated: June 17, 2026 at 04:22 AM UTC
2 products affected across 1 vendorMattermost ServerMattermost

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.9%
SSVC
No known exploit

Description

The image proxy component in Mattermost version 6.4.1 and earlier allocates memory for multiple copies of a proxied image, which allows an authenticated attacker to crash the server via links to very large image files.

Affected

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

Mattermost Server· Mattermost
95%
5.37.0 ≤ v < 5.37.96.2.0 ≤ v < 6.2.56.3.0 ≤ v < 6.3.56.4.0 ≤ v < 6.4.2
Affected range stops below 5.37.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.2.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.3.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.4.2, so it looks safe — our inference, not a vendor statement
Mattermost· Mattermost
60%
5.37 ≤ v < 5.37.96.2 ≤ v < 6.2.56.3 ≤ v < 6.3.56.4 ≤ v < 6.4.25.376.26.36.4
Affected range stops below 5.37.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.2.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.3.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.4.2, so it looks safe — our inference, not a vendor statement

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)

x_refsource_MISCVendor 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

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-400CWE-770

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