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CVE-2020-5203

29
FAUCET Score

CVE-2020-5203 is a critical arbitrary code execution vulnerability affecting Fat-Free Framework 3.7.1, occurring when developers pass user-controlled input directly to the framework's Clear method. This vulnerability carries a CVSS score of 9.8 (Critical) due to its network-based attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
3.7.1CPE matchmatch criteria
cpe:2.3:a:fatfreeframework:fat-free_framework:3.7.1:*:*:*:*:*:*:*

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
2.14%
Probability of exploitation in next 30 days
EPSS Percentile
80.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0214 is in the 69th percentile among its peer group of 36,833 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: bcosca/fatfreeFixed in: 3.7.2
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-hpj2-4hfj-g233critical

Fat-Free Framework arbitrary code execution

May 24, 2022

References

github.com / bcosca/fatfree-core/commit/dae95a0baf3963a9ef87c17cee52f78f77e21829
PatchThird Party Advisory
github.com / bcosca/fatfree/releases
Release NotesThird Party Advisory