CVE-2026-112067

Captcha Bypass in extension "Accessible Form Captcha" (bw_captcha)

State
Published
Severity
6.9 Medium
Published
Oct 20, 2026
Updated
Oct 24, 2026
Reserved
Oct 18, 2026

Read the record on cve.org

Description

The extension hides the correct answer to each CAPTCHA inside the image data of the CAPTCHA itself. Anyone who can request a CAPTCHA image can read the answer from it and submit it, so automated clients can pass the challenge. This applies to the default configuration, because the audio feature that causes the answer to be embedded is enabled by default. Forms that rely on the CAPTCHA as their only protection against automated submissions are exposed to abuse by bots.

Scores

CVSSScoreVectorSource
4.06.9 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:NTYPO3

Weaknesses

  • CWE-804 Guessable CAPTCHA
  • CWE-656 Reliance on Security Through Obscurity

Affected Products

ProductVersions
Extension "Accessible Form Captcha"TYPO3
  • 4.0.0 to before 5.4.2Affected

References

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