CVE-2020-13893

Name: CVE-2020-13893
Creator: NVD / NIST
Published: 2020-10-18T19:15:12.18+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.53%

Last modified Jun 17, 2026

CVE-2020-13893 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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).. EPSS estimates a 0.53% chance of exploitation in the next 30 days.

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).

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.53%

40.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Sage	Easypay	10.7.5.10

References

https://gist.github.com/picar0jsu/4532a6d15e8f8d7597b7dca5136ad655Third Party Advisory
https://www.sage.com/en-sg/products/sage-easypay/Product, Vendor Advisory
https://gist.github.com/picar0jsu/4532a6d15e8f8d7597b7dca5136ad655Third Party Advisory
https://www.sage.com/en-sg/products/sage-easypay/Product, Vendor Advisory

Timeline

Published: Oct 18, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-13893?

How severe is CVE-2020-13893?

CVE-2020-13893 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.53% probability of exploitation in the next 30 days.

How do I fix CVE-2020-13893?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-13893?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST