How severe is CVE-2020-15721?

CVE-2020-15721 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-2020-15721 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-15721?

CVE-2020-15721 primarily affects Rosariosis. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-15721?

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

When was CVE-2020-15721 published?

CVE-2020-15721 was published on 2020-07-14 and last updated on 2026-06-17.

CVE-2020-15721

CVE-2020-15721 is a medium-severity vulnerability in Rosariosis 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% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Rosariosis
Published: 2020-07-14
Last modified: 2026-06-17

Description

RosarioSIS through 6.8-beta allows modules/Custom/NotifyParents.php XSS because of the href attributes for AddStudents.php and User.php.

Frequently asked questions

What is CVE-2020-15721?: RosarioSIS through 6.8-beta allows modules/Custom/NotifyParents.php XSS because of the href attributes for AddStudents.php and User.php.
How severe is CVE-2020-15721?: CVE-2020-15721 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-2020-15721 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-15721?: CVE-2020-15721 primarily affects Rosariosis. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-15721?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-15721 published?: CVE-2020-15721 was published on 2020-07-14 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:a:rosariosis:rosariosis:*:*:*:*:*:*:*:*
cpe:2.3:a:rosariosis:rosariosis:6.8:-:*:*:*:*:*:*
cpe:2.3:a:rosariosis:rosariosis:6.8:beta:*:*:*:*:*:*

More vulnerabilities in Rosariosis

CVE-2022-2714 — Critical (CVSS 9.8): Improper Handling of Length Parameter Inconsistency in GitHub repository francoisjacquet/rosariosis prior to 10.0.
CVE-2021-44567 — Critical (CVSS 9.8): An unauthenticated SQL Injection vulnerability exists in RosarioSIS before 7.6.1 via the votes parameter in…
CVE-2021-44427 — Critical (CVSS 9.8): An unauthenticated SQL Injection vulnerability in Rosario Student Information System (aka rosariosis) before 8.1.1…
CVE-2022-2067 — Critical (CVSS 9.1): SQL Injection in GitHub repository francoisjacquet/rosariosis prior to 9.0.
CVE-2023-2665 — High (CVSS 7.5): Storage of Sensitive Data in a Mechanism without Access Control in GitHub repository francoisjacquet/rosariosis prior…
CVE-2023-0994 — High (CVSS 7.5): Exposure of Sensitive Information to an Unauthorized Actor in GitHub repository francoisjacquet/rosariosis prior to…

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