Reflected Cross-Site Scripting Vulnerability in Lucee CFML Server
CVE-2026-29519

6.2MEDIUM

Key Information:

Vendor

Lucee

Status
Lucee
Vendor
CVE Published:
10 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-29519?

The Lucee CFML Server versions 5.3.x, 6.1.x, 6.2.x, and 7.0.x are vulnerable to a reflected cross-site scripting vulnerability due to improper input handling in URL path parsing. This flaw allows unauthenticated remote attackers to inject arbitrary JavaScript into the server's responses. Attackers can craft malicious URLs containing script content, which is reflected back to users visiting the link. If exploited, this could lead to session hijacking or unauthorized actions against the Lucee administrative interface, posing significant risks to users.

Affected Version(s)

Lucee 5.3.1.95 <= 7.0.0.395

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-29519 - Proof of Concept

References

https://github.com/L4V4D0/CVE-2026-29519-Lucee-Reflected-XSS
technical-descriptionexploit
https://www.vulncheck.com/advisories/lucee-cfml-server-re...
third-party-advisory

CVSS V4

Score:
6.2
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Fouad Milat (lavado)
VulnCheck
.