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CVE-2019-14243

24
FAUCET Score

CVE-2019-14243 describes a denial-of-service vulnerability in mastercactapus proxyprotocol versions prior to 0.0.2, affecting the caddy-proxyprotocol plugin for Caddy. An unauthenticated remote attacker can trigger a webserver panic and daemon crash by sending a malformed HAProxy PROXY v2 request with truncated address data. This vulnerability has a CVSS score of 7.5 (High) due to its network-based attack vector, low attack complexity, and high impact on availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.0.2CPE matchmatch criteria
cpe:2.3:a:haproxy:proxyprotocol:*:*:*:*:*:caddy:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.29%
Probability of exploitation in next 30 days
EPSS Percentile
90.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0430 is in the 82nd percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/mastercactapus/proxyprotocolFixed in: 0.0.2

Vendor Advisories (1)

goGHSA-85c5-ccm8-vr96high

mastercactapus proxyprotocol vulnerable to denial of service

May 24, 2022

References

caddy.community / t/dos-in-http-proxyprotocol-plugin/6014
Third Party Advisory
github.com / mastercactapus/caddy-proxyprotocol/issues/8
Issue TrackingThird Party Advisory
github.com / mastercactapus/proxyprotocol/commit/5c4a101121fc3e868026189c7a73f7f19eef90ac
PatchThird Party Advisory
github.com / mastercactapus/proxyprotocol/compare/ef496d7...5c4a101
Third Party Advisory
github.com / mastercactapus/proxyprotocol/issues/1
ExploitThird Party Advisory
github.com / mastercactapus/proxyprotocol/releases/tag/v0.0.2
Release NotesThird Party Advisory