What’s Vulnerable › Vulnerabilities

CVE-2021-40353

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-01 · updated 2026-06-17
• Weakness: CWE-89

Description

A SQL injection vulnerability exists in version 8.0 of openSIS when MySQL or MariaDB is used as the application database. An attacker can then issue the SQL command through the index.php USERNAME parameter. NOTE: this issue may exist because of an incomplete fix for CVE-2020-6637.

Affected products

• OS4ED openSIS-Classic: 8.0

References

• https://github.com/5qu1n7/CVE-2021-40353
• https://www.opensis.com/download/english
• https://github.com/5qu1n7/CVE-2021-40353
• https://www.opensis.com/download/english

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