XSS in Lucee
CVE-2026-29519
Lucee CFML Server versions across the 5.3.x, 6.1.x, 6.2.x, and 7.0.x release lines contain a reflected cross-site scripting vulnerability in URL path parsing that allows unauthenticated remote attackers to execute arbitrary JavaScript in a victim's browser by embedding HTML or JavaScript payloads within the request path. Attackers can craft a malicious URL containing injected script content that is reflected in the server's response without proper output encoding, enabling session hijacking or unauthorized actions against the Lucee administrative interface when a victim visits the crafted link.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (38.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.000
Affected products
- Lucee — versions 5.3.1.95
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/L4V4D0/CVE-2026-29519-Lucee-Reflected-XSS (technical-description, exploit)
- www.vulncheck.com/advisories/lucee-cfml-server-reflected-xss-via-url-path-parsi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-29519?
- CVE-2026-29519 is a high-severity vulnerability in Lucee, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2026-07-10.
- How severe is CVE-2026-29519?
- High severity. CVSS v3 base score is 8.2 out of 10.
- Is CVE-2026-29519 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.