CVE-2019-16699

Name: CVE-2019-16699
Creator: NVD / NIST
Published: 2019-10-16T19:15:15.88+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.43%

Last modified Jun 17, 2026

CVE-2019-16699 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The sr_freecap (aka freeCap CAPTCHA) extension 2.4.5 and below and 2.5.2 and below for TYPO3 fails to sanitize user input, which allows execution of arbitrary Extbase actions, resulting in Remote Code Execution.. EPSS estimates a 2.43% chance of exploitation in the next 30 days.

Description

The sr_freecap (aka freeCap CAPTCHA) extension 2.4.5 and below and 2.5.2 and below for TYPO3 fails to sanitize user input, which allows execution of arbitrary Extbase actions, resulting in Remote Code Execution.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.43%

82.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Sr Freecap Project	Sr Freecap	>= 2.4.0, <= 2.4.5
Sr Freecap Project	Sr Freecap	>= 2.5.0, <= 2.5.2

References

https://extensions.typo3.org/extension/sr_freecapThird Party Advisory
https://typo3.org/security/advisory/typo3-ext-sa-2019-018/Third Party Advisory
https://extensions.typo3.org/extension/sr_freecapThird Party Advisory
https://typo3.org/security/advisory/typo3-ext-sa-2019-018/Third Party Advisory

Timeline

Published: Oct 16, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-16699?

How severe is CVE-2019-16699?

CVE-2019-16699 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.43% probability of exploitation in the next 30 days.

How do I fix CVE-2019-16699?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-16699?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST