CVE-2021-24876 json
Registrations for The Events Calendar < 2.7.5 - Reflected Cross-Site Scripting
published 2021-11-29 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-11788
- cvss
- 6.1
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 73%
- public exploits
- 0
- none known, plus a Nuclei check
Summary
The Registrations for the Events Calendar WordPress plugin before 2.7.5 does not escape the v parameter before outputting it back in an attribute, leading to a Reflected Cross-Site Scripting
Patch / fix
- roundupwp registrations_for_the_events_calendar 2.7.5
Exploit prediction
1.44% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Nuclei template Registrations for The Events Calendar < 2.7.5 - Authenticated Reflected Cross-Site Scripting nuclei detection template
- wpscan.com https://wpscan.com/vulnerability/e77c2493-993d-418d-9629-a1f07b5a2b6f referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
Affected products
- Unknown Registrations for the Events Calendar – Event Registration Plugin
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
- Technology feeds
References
-
wpscan.com
/vulnerability/e77c2493-993d-418d-9629-a1f07b5a2b6f
exploit, third-party-advisory
Sources
- CVE List CVE-2021-24876
- NVD CVE-2021-24876
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.