What’s Vulnerable › Vulnerabilities

CVE-2021-40637

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-03-03 · updated 2026-06-17
• Weakness: CWE-79

Description

OS4ED openSIS 8.0 is affected by cross-site scripting (XSS) in EmailCheckOthers.php. An attacker can inject JavaScript code to get the user's cookie and take over the working session of user.

Affected products

• OS4ED openSIS-Classic: 8.0

References

• https://github.com/OS4ED/openSIS-Classic/issues/199
• https://github.com/OS4ED/openSIS-Classic/issues/199

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