How severe is CVE-2021-24309?

CVE-2021-24309 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-24309 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24309?

CVE-2021-24309 affects Weekly Schedule Project Weekly Schedule. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24309?

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

When was CVE-2021-24309 published?

CVE-2021-24309 was published on 2021-06-01 and last updated on 2026-06-17.

CVE-2021-24309

CVE-2021-24309 is a medium-severity vulnerability in Weekly Schedule Project Weekly Schedule with a CVSS 3.x base score of 5.4. 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 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Weekly Schedule Project Weekly Schedule
Published: 2021-06-01
Last modified: 2026-06-17

Description

The "Schedule Name" input in the Weekly Schedule WordPress plugin before 3.4.3 general options did not properly sanitize input, allowing a user to inject javascript code using the <script> HTML tags and cause a stored XSS issue

Frequently asked questions

What is CVE-2021-24309?: The "Schedule Name" input in the Weekly Schedule WordPress plugin before 3.4.3 general options did not properly sanitize input, allowing a user to inject javascript code using the <script> HTML tags and cause a stored XSS issue
How severe is CVE-2021-24309?: CVE-2021-24309 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-24309 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24309?: CVE-2021-24309 affects Weekly Schedule Project Weekly Schedule. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24309?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-24309 published?: CVE-2021-24309 was published on 2021-06-01 and last updated on 2026-06-17.

References

https://wpscan.com/vulnerability/ba1d01dc-16e4-464f-94be-ed311ff6ccf9

Affected products (1)

cpe:2.3:a:weekly_schedule_project:weekly_schedule:*:*:*:*:*:wordpress:*:*

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