CVE-2022-27311Public exploitNetwork attack vector

Arbitrary internal requests via API-key host injection

Published Apr 25, 2022 · Updated Aug 3, 2024

SSRF in Gibbon before 3.4.4 allows attackers to send arbitrary HTTP requests through applications accepting user-supplied API keys. Gibbon splits the API key at hyphens and concatenates the unchecked suffix into base_api_url as a Mailchimp data-center subdomain. Exposure requires a consuming application to pass user-controlled API keys; crafted suffixes redirect Faraday requests to internal or attacker hosts.

CVSS severity9.8
Critical
EPSS probability1.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Gibbon before 3.4.4 allows attackers to send arbitrary HTTP requests through applications accepting user-supplied API keys. Gibbon splits the API key at hyphens and concatenates the unchecked suffix into base_api_url as a Mailchimp data-center subdomain. Exposure requires a consuming application to pass user-controlled API keys; crafted suffixes redirect Faraday requests to internal or attacker hosts.

The record

CVE
CVE-2022-27311
Published
Apr 25, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-918
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 25, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P

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.

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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)

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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