How severe is CVE-2021-39408?

CVE-2021-39408 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-39408 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-39408?

CVE-2021-39408 affects Online Student Rate System Project Online Student Rate System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-39408?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-39408 published?

CVE-2021-39408 was published on 2022-06-24 and last updated on 2026-06-17.

CVE-2021-39408

CVE-2021-39408 is a medium-severity vulnerability in Online Student Rate System Project Online Student Rate System with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (66th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Online Student Rate System Project Online Student Rate System
Published: 2022-06-24
Last modified: 2026-06-17

Description

Cross Site Scripting (XSS) vulnerability exists in Online Student Rate System 1.0 via the page parameter on the index.php file

Frequently asked questions

What is CVE-2021-39408?: Cross Site Scripting (XSS) vulnerability exists in Online Student Rate System 1.0 via the page parameter on the index.php file
How severe is CVE-2021-39408?: CVE-2021-39408 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-39408 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-39408?: CVE-2021-39408 affects Online Student Rate System Project Online Student Rate System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-39408?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-39408 published?: CVE-2021-39408 was published on 2022-06-24 and last updated on 2026-06-17.

References

https://github.com/StefanDorresteijn/CVE-2021-39408

Affected products (1)

cpe:2.3:a:online_student_rate_system_project:online_student_rate_system:1.0:*:*:*:*:*:*:*

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