What’s Vulnerable › Vulnerabilities

CVE-2020-13893

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-10-18 · updated 2026-06-17
• Weakness: CWE-79

Description

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).

Affected products

• Sage Easypay: 10.7.5.10

References

• https://gist.github.com/picar0jsu/4532a6d15e8f8d7597b7dca5136ad655
• https://www.sage.com/en-sg/products/sage-easypay/
• https://gist.github.com/picar0jsu/4532a6d15e8f8d7597b7dca5136ad655
• https://www.sage.com/en-sg/products/sage-easypay/

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