What’s Vulnerable › Vulnerabilities
CVE-2026-112067: Captcha Bypass in extension "Accessible Form Captcha" (bw_captcha)
- Severity: medium (CVSS 6.9 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-20 · updated 2026-10-20
- Weakness: CWE-656
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.
Affected products
- TYPO3 Extension "Accessible Form Captcha": from 4.0.0 before 5.4.2 — fixed in 5.4.2
How to fix
Upgrade to a fixed version: TYPO3 Extension "Accessible Form Captcha" 5.4.2. Check the vendor advisory for mitigations.
References
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