XSS in Sage Easypay
CVE-2020-13893
Multiple stored cross-site scripting (XSS) vulnerabilities in Sage EasyPay 10.7.5.10 allow authenticated attackers to inject arbitrary web script or HTML via multiple parameters through Unicode Transformations (Best-fit Mapping), as demonstrated by the full-width variants of the less-than sign (%EF%BC%9C) and greater-than sign (%EF%BC%9E).
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.005 (42.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.7% 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
- Sage Easypay — versions 10.7.5.10
Weakness classification (CWE)
References
- www.sage.com/en-sg/products/sage-easypay/ (Product, Vendor Advisory)
- gist.github.com/picar0jsu/4532a6d15e8f8d7597b7dca5136ad655 (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-13893?
- CVE-2020-13893 is a medium-severity vulnerability in Sage Easypay, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2020-10-18.
- How severe is CVE-2020-13893?
- Medium severity. CVSS v3 base score is 5.4 out of 10.