CVE-2024-37157Network attack vector

Authenticated SSRF via unchecked FastImage redirects

Published Jul 3, 2024 · Updated Aug 2, 2024

SSRF in FastImage in Discourse stable 3.2.2 and earlier allows remote authenticated users to send requests to internal IP addresses. FastImage created HTTP connections from attacker-controlled image URLs without routing hostname resolution through FinalDestination's SSRF detector, so redirects could resolve to private addresses. A low-privileged account and a redirect are required; reachable internal services can disclose data or accept requests, and beta and tests-passed 3.3.0.beta3 and earlier are affected.

CVSS severity6.4
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in FastImage in Discourse stable 3.2.2 and earlier allows remote authenticated users to send requests to internal IP addresses. FastImage created HTTP connections from attacker-controlled image URLs without routing hostname resolution through FinalDestination's SSRF detector, so redirects could resolve to private addresses. A low-privileged account and a redirect are required; reachable internal services can disclose data or accept requests, and beta and tests-passed 3.3.0.beta3 and earlier are affected.

The record

CVE
CVE-2024-37157
Published
Jul 3, 2024
Updated
Aug 2, 2024
Vendor
Discourse
Product
Discourse
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=beta < 3.3.0.beta4
  2. Affected versionversion=stable < 3.2.3
  3. Affected versionversion=tests-passed < 3.3.0.beta4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Discourse · Discourseversion=beta < 3.3.0.beta4; version=stable < 3.2.3; version=tests-passed < 3.3.0.beta4

Published CVSS scores

6.4GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L
5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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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