How severe is CVE-2020-28129?

CVE-2020-28129 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-2020-28129 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-28129?

CVE-2020-28129 affects Admerc Gym Management System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-28129?

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

When was CVE-2020-28129 published?

CVE-2020-28129 was published on 2020-11-17 and last updated on 2026-06-17.

CVE-2020-28129

CVE-2020-28129 is a medium-severity vulnerability in Admerc Gym Management 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% (57th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Admerc Gym Management System
Published: 2020-11-17
Last modified: 2026-06-17

Description

Stored Cross-site scripting (XSS) vulnerability in SourceCodester Gym Management System 1.0 allows users to inject and store arbitrary JavaScript code in index.php?page=packages via vulnerable fields 'Package Name' and 'Description'.

Frequently asked questions

What is CVE-2020-28129?: Stored Cross-site scripting (XSS) vulnerability in SourceCodester Gym Management System 1.0 allows users to inject and store arbitrary JavaScript code in index.php?page=packages via vulnerable fields 'Package Name' and 'Description'.
How severe is CVE-2020-28129?: CVE-2020-28129 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-2020-28129 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (57th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-28129?: CVE-2020-28129 affects Admerc Gym Management System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-28129?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-28129 published?: CVE-2020-28129 was published on 2020-11-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:admerc:gym_management_system:1.0:*:*:*:*:*:*:*

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