What is CVE-2021-25024?

CVE-2021-25024 is a medium-severity vulnerability in Theeventscalendar Eventcalendar, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-01-17.

How severe is CVE-2021-25024?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2021-25024 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Theeventscalendar Eventcalendar

CVE-2021-25024

The EventCalendar WordPress plugin before 1.1.51 does not escape some user input before outputting it back in attributes, leading to Reflected Cross-SIte Scripting issues

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-01-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (55.3th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Theeventscalendar Eventcalendar
Eventcalendar — versions 1.1.51

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

20142995/nuclei-templates

References

wpscan.com/vulnerability/08864b76-d898-4dfe-970d-d7cc1b1115a7 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-25024?: CVE-2021-25024 is a medium-severity vulnerability in Theeventscalendar Eventcalendar, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-01-17.
How severe is CVE-2021-25024?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2021-25024 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.