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CVE-2019-16699

28
FAUCET Score

CVE-2019-16699 describes a critical remote code execution vulnerability affecting the sr_freecap (freeCap CAPTCHA) extension for TYPO3, specifically versions 2.4.5 and below, and 2.5.2 and below. This flaw stems from insufficient sanitization of user input, enabling attackers to execute arbitrary Extbase actions. With a CVSS score of 9.8 (CRITICAL), this vulnerability is easily exploitable over the network without authentication or user interaction, leading to complete compromise of confidentiality, integrity, and availability. While no active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB) has been identified, and community discussion is minimal, its high severity and ease of exploitation warrant immediate patching.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.4.0, <= 2.4.5CPE matchmatch criteria
cpe:2.3:a:sr_freecap_project:sr_freecap:*:*:*:*:*:*:*:*
>= 2.5.0, <= 2.5.2CPE matchmatch criteria
cpe:2.3:a:sr_freecap_project:sr_freecap:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.43%
Probability of exploitation in next 30 days
EPSS Percentile
82.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0243 is in the 72nd percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: sjbr/sr-freecapFixed in: 2.5.3
composerpatch availablevia ghsa
Product: sjbr/sr-freecapFixed in: 2.4.6

Vendor Advisories (1)

composerGHSA-598p-rv6p-g7qccritical

sr_freecap for Typo3 RCE Vulnerability

May 24, 2022

References

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