CVE-2021-24927
CVE-2021-24927 is a medium-severity vulnerability in My Calendar Project My Calendar 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% (44th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-79
- Affected product: My Calendar Project My Calendar
- Published:
- Last modified:
Description
The My Calendar WordPress plugin before 3.2.18 does not sanitise and escape the callback parameter of the mc_post_lookup AJAX action (available to any authenticated user) before outputting it back in the response, leading to a Reflected Cross-Site Scripting issue
Frequently asked questions
- What is CVE-2021-24927?
- The My Calendar WordPress plugin before 3.2.18 does not sanitise and escape the callback parameter of the mc_post_lookup AJAX action (available to any authenticated user) before outputting it back in the response, leading to a Reflected Cross-Site Scripting issue
- How severe is CVE-2021-24927?
- CVE-2021-24927 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-2021-24927 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-24927?
- CVE-2021-24927 affects My Calendar Project My Calendar. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-24927?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-24927 published?
- CVE-2021-24927 was published on 2021-11-29 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:my_calendar_project:my_calendar:*:*:*:*:*:wordpress:*:*
More vulnerabilities in My Calendar Project My Calendar
- CVE-2019-15713 — Medium (CVSS 6.1): The my-calendar plugin before 3.1.10 for WordPress has XSS.
- CVE-2023-23813 — Medium (CVSS 5.4): Cross-Site Request Forgery (CSRF) vulnerability in Joseph C Dolson My Calendar plugin <= 3.4.3 versions.
- CVE-2022-47427 — Medium (CVSS 5.4): Cross-Site Request Forgery (CSRF) vulnerability in Joseph C Dolson My Calendar plugin <= 3.3.24.1 versions.
All CVEs affecting My Calendar Project My Calendar →
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