CVE-2020-24327Public exploitNetwork attack vector

Server-side request forgery via remote image upload

Published Sep 23, 2021 · Updated Aug 4, 2024

Server-side request forgery in Discourse 2.3.2 and 2.6 allows remote attackers to trigger server-side GET requests through image uploads. The message composer accepts an attacker-supplied remote image URL, and the server retrieves that URL when it prepares and sends the resulting message. NVD's assessment reflects no prior privileges, while the public reproduction demonstrates only a blind outbound request and does not establish response disclosure.

CVSS severity5.3
Medium
EPSS probability1.06%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Discourse 2.3.2 and 2.6 allows remote attackers to trigger server-side GET requests through image uploads. The message composer accepts an attacker-supplied remote image URL, and the server retrieves that URL when it prepares and sends the resulting message. NVD's assessment reflects no prior privileges, while the public reproduction demonstrates only a blind outbound request and does not establish response disclosure.

The record

CVE
CVE-2020-24327
Published
Sep 23, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-918, CAPEC-664
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 23, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:P/A:N
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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
CAPEC-664Server Side Request Forgery

Public exploit references

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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