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CVE-2021-24927

MEDIUMCVSS 5.4/10EPSS 0.60%

Last modified

CVE-2021-24927 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.60% chance of exploitation in the next 30 days.

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

Metrics

CVSS 3.1
5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability
0.60%

44.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
My Calendar ProjectMy Calendar< 3.2.18

References

Timeline

Published
Last Modified
Status
Modified

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 score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.60% probability of exploitation in the next 30 days.
How do I fix CVE-2021-24927?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-24927?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST