CVE-2021-24687: unknown modern events calendar lite Cross-site Scripting
Vulnerability summary
CVE-2021-24687 is a medium (CVSS 4.8) Cross-site Scripting vulnerability in unknown modern events calendar lite. EPSS estimates a 0.62% chance of exploitation in the next 30 days, higher than 48.5% of scored vulnerabilities. 1 public exploit is recorded. Fixed in 5.22.2.
Timeline
- 04-10-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
The Modern Events Calendar Lite WordPress plugin before 5.22.2 does not escape some of its settings before outputting them in attributes, allowing high privilege users to perform Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed.
CVSS metrics
3 scores · 2 sources · 2 versions- wordfenceSource4.8MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
EPSS trend
Probability
0.62%
Chance of exploitation in the next 30 days
Percentile
49%
Versus all other CVEs
30-day change
0.00 pp
From 0.62% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (wpscan.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Unknown1 product
- modern events calendar lite≥ 5.22.2, < 5.22.2
Webnus1 product
- modern events calendar lite< 5.22.2
Wordpress1 product
- modern-events-calendar-lite≤ 5.22.1 (fixed in 5.22.2)
3 vendors · 3 products
References
2 links- wpscan.com/vulnerability/300ba418-63ed-4c03-9031-263742ed522eX Refsource MISCExploitThird Party Advisory