XSS in Webnus Modern Events Calendar Lite
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.007 (53.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 53.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Webnus Modern Events Calendar Lite
- Modern Events Calendar Lite — versions 5.16.5
Weakness classification (CWE)
Public proof-of-concept exploits
References
- wpscan.com/vulnerability/0f9ba284-5d7e-4092-8344-c68316b0146f (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-24147?
- CVE-2021-24147 is a medium-severity vulnerability in Webnus Modern Events Calendar Lite, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-03-18.
- How severe is CVE-2021-24147?
- Medium severity. CVSS v3 base score is 5.4 out of 10.
- Is CVE-2021-24147 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.