CVE-2022-47408Network attack vector

Mass subscription via CAPTCHA bypass

Published Dec 14, 2022 · Updated Apr 21, 2025

CAPTCHA bypass in the TYPO3 fp_newsletter extension allows remote attackers to automate creation of arbitrary newsletter subscribers. Published material identifies the CAPTCHA gate but does not disclose the validation error or request field that causes a failed challenge to be accepted. Exploitation requires the optional third-party extension and a reachable subscription form, but no account or user interaction; the bounded impact is unwanted subscriber records.

CVSS severity9.1
Critical
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

CAPTCHA bypass in the TYPO3 fp_newsletter extension allows remote attackers to automate creation of arbitrary newsletter subscribers. Published material identifies the CAPTCHA gate but does not disclose the validation error or request field that causes a failed challenge to be accepted. Exploitation requires the optional third-party extension and a reachable subscription form, but no account or user interaction; the bounded impact is unwanted subscriber records.

The record

CVE
CVE-2022-47408
Published
Dec 14, 2022
Updated
Apr 21, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-863, CWE-287, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 14, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 2025Record 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

9.1GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
CWE-287Improper Authentication
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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