CVE-2024-45843Network attack vector

Cloud metadata disclosure via incomplete SSRF denylist

Published Sep 26, 2024 · Updated Sep 26, 2024

SSRF in Mattermost 9.5.0 through 9.5.8 allows remote authenticated users to access cloud metadata through crafted server-side requests. The outbound-request SSRF denylist omits Oracle Cloud and Alibaba metadata endpoints, so requests to those addresses are not blocked. Exploitation requires deployment in either cloud and low-privileged authenticated access; the published impact is limited to reading metadata-reachable information.

CVSS severity3.1
Low
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Mattermost 9.5.0 through 9.5.8 allows remote authenticated users to access cloud metadata through crafted server-side requests. The outbound-request SSRF denylist omits Oracle Cloud and Alibaba metadata endpoints, so requests to those addresses are not blocked. Exploitation requires deployment in either cloud and low-privileged authenticated access; the published impact is limited to reading metadata-reachable information.

The record

CVE
CVE-2024-45843
Published
Sep 26, 2024
Updated
Sep 26, 2024
Vendor
Mattermost
Product
Mattermost
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=9.5.0 <=9.5.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Mattermost · Mattermostversion=9.5.0 <=9.5.8

Published CVSS scores

3.1MattermostCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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