What’s Vulnerable › Vulnerabilities

CVE-2021-40542

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-10-11 · updated 2026-06-17
• Weakness: CWE-79

Description

Opensis-Classic Version 8.0 is affected by cross-site scripting (XSS). An unauthenticated user can inject and execute JavaScript code through the link_url parameter in Ajax_url_encode.php.

Affected products

• OS4ED openSIS-Classic: 8.0

References

• https://github.com/OS4ED/openSIS-Classic/issues/189
• https://github.com/OS4ED/openSIS-Classic/issues/189

Get alerted when CVE-2021-40542 or the next vulnerability affects your stack