How severe is CVE-2021-24873?

CVE-2021-24873 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-2021-24873 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24873?

CVE-2021-24873 affects Themeum Tutor Lms. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24873?

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

When was CVE-2021-24873 published?

CVE-2021-24873 was published on 2021-11-23 and last updated on 2026-06-17.

CVE-2021-24873

CVE-2021-24873 is a medium-severity vulnerability in Themeum Tutor Lms 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% (55th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Themeum Tutor Lms
Published: 2021-11-23
Last modified: 2026-06-17

Description

The Tutor LMS WordPress plugin before 1.9.11 does not sanitise and escape user input before outputting back in attributes in the Student Registration page, leading to a Reflected Cross-Site Scripting issue

Frequently asked questions

What is CVE-2021-24873?: The Tutor LMS WordPress plugin before 1.9.11 does not sanitise and escape user input before outputting back in attributes in the Student Registration page, leading to a Reflected Cross-Site Scripting issue
How severe is CVE-2021-24873?: CVE-2021-24873 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-2021-24873 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24873?: CVE-2021-24873 affects Themeum Tutor Lms. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24873?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-24873 published?: CVE-2021-24873 was published on 2021-11-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:themeum:tutor_lms:*:*:*:*:*:wordpress:*:*

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