XSS in Htmly
CVE-2025-56154
htmly v3.0.8 is vulnerable to Cross Site Scripting (XSS) in the /author/:name endpoint of the affected application. The name parameter is not properly sanitized before being reflected in the HTML response, allowing attackers to inject arbitrary JavaScript payloads.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (22.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Htmly — versions 3.0.8
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/danpros/htmly/releases/tag/v3.0.9 (Release Notes)
- gist.github.com/akinerkisa/28e97fa132b1a98cff5d05a79b437901 (Third Party Advisory)
- pastebin.com/dVityKmU
Frequently asked questions
- What is CVE-2025-56154?
- CVE-2025-56154 is a medium-severity vulnerability in Htmly, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-10-02.
- How severe is CVE-2025-56154?
- Medium severity. CVSS v3 base score is 6.1 out of 10.
- Is CVE-2025-56154 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.