CVE-2020-8603

Name: CVE-2020-8603
Creator: NVD / NIST
Published: 2020-05-27T23:15:11.167+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 1.98%

Last modified Jun 17, 2026

CVE-2020-8603 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. A cross-site scripting vulnerability (XSS) in Trend Micro InterScan Web Security Virtual Appliance 6.5 may allow a remote attacker to tamper with the web interface of affected installations. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.. EPSS estimates a 1.98% chance of exploitation in the next 30 days.

Description

A cross-site scripting vulnerability (XSS) in Trend Micro InterScan Web Security Virtual Appliance 6.5 may allow a remote attacker to tamper with the web interface of affected installations. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

1.98%

78.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Trendmicro	Interscan Web Security Virtual Appliance	6.5

References

https://success.trendmicro.com/solution/000253095Patch, Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-675/Third Party Advisory, VDB Entry
https://success.trendmicro.com/solution/000253095Patch, Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-675/Third Party Advisory, VDB Entry

Timeline

Published: May 27, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-8603?

How severe is CVE-2020-8603?

CVE-2020-8603 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 1.98% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8603?

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-2020-8603?

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

Scan your code now

Source: NVD / NIST