XSS in Lunary
CVE-2025-5352
A critical stored Cross-Site Scripting (XSS) vulnerability exists in the Analytics component of lunary-ai/lunary versions up to 1.9.23, where the NEXT_PUBLIC_CUSTOM_SCRIPT environment variable is directly injected into the DOM using dangerouslySetInnerHTML without any sanitization or validation. This allows arbitrary JavaScript execution in all users' browsers if an attacker can control the environment variable during deployment or through server compromise. The vulnerability can lead to complete account takeover, data exfiltration, malware distribution, and persistent attacks affecting all users until the environment variable is cleaned. The issue is fixed in version 1.9.25.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (40.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 40th percentile — 40.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Lunary
- Lunary-Ai Lunary-Ai/lunary — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- huntr.com/bounties/f1d3dbce-3c3e-480e-b81e-0e8afa05c491 (Exploit, Patch, Third Party Advisory)
- github.com/lunary-ai/lunary/commit/e2e43e88cecf742bacb639ab880507bbfdfd065c (Patch)
Frequently asked questions
- What is CVE-2025-5352?
- CVE-2025-5352 is a critical-severity vulnerability in Lunary, classified under Cross-site Scripting. CVSS score: 9.6/10. Published 2025-08-23.
- How severe is CVE-2025-5352?
- Critical severity. CVSS v3 base score is 9.6 out of 10.
- Is CVE-2025-5352 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.