How severe is CVE-2021-24147?

CVE-2021-24147 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-2021-24147 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-24147?

CVE-2021-24147 affects Webnus Modern Events Calendar Lite. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-24147?

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

When was CVE-2021-24147 published?

CVE-2021-24147 was published on 2021-03-18 and last updated on 2026-06-17.

CVE-2021-24147

CVE-2021-24147 is a medium-severity vulnerability in Webnus Modern Events Calendar Lite 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% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Webnus Modern Events Calendar Lite
Published: 2021-03-18
Last modified: 2026-06-17

Description

Unvalidated input and lack of output encoding in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5, did not sanitise the mic_comment field (Notes on time) when adding/editing an event, allowing users with privilege as low as author to add events with a Cross-Site Scripting payload in them, which will be triggered in the frontend when viewing the event.

Frequently asked questions

What is CVE-2021-24147?: Unvalidated input and lack of output encoding in the Modern Events Calendar Lite WordPress plugin, versions before 5.16.5, did not sanitise the mic_comment field (Notes on time) when adding/editing an event, allowing users with privilege as low as author to add events with a Cross-Site Scripting payload in them, which will be triggered in the frontend when viewing the event.
How severe is CVE-2021-24147?: CVE-2021-24147 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-2021-24147 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-24147?: CVE-2021-24147 affects Webnus Modern Events Calendar Lite. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-24147?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-24147 published?: CVE-2021-24147 was published on 2021-03-18 and last updated on 2026-06-17.

References

https://wpscan.com/vulnerability/0f9ba284-5d7e-4092-8344-c68316b0146f

Affected products (1)

cpe:2.3:a:webnus:modern_events_calendar_lite:*:*:*:*:*:wordpress:*:*

More vulnerabilities in Webnus Modern Events Calendar Lite

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