CVE-2021-37211: Larvata Digital Technology Co. Ltd. FLYGO - Stored XSS

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: 2021-08-09 · updated 2026-06-17
Weakness: CWE-79

Description

The bulletin function of Flygo does not filter special characters while a new announcement is added. Remoter attackers can use the vulnerability with general user’s credential to inject JavaScript and execute stored XSS attacks.

Affected products

Larvata Digital Technology Co. Ltd. FLYGO: before 1.91.1 — fixed in 1.91.1

How to fix

Upgrade to a fixed version: Larvata Digital Technology Co. Ltd. FLYGO 1.91.1. Check the vendor advisory for mitigations.

References

https://www.twcert.org.tw/tw/cp-132-4988-8f642-1.html
https://www.twcert.org.tw/tw/cp-132-4988-8f642-1.html

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