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Fencer Vulns
medium 5.3

CVE-2023-3219 json

EventON < 2.1.2 - Unauthenticated Post Access via IDOR

published 2023-07-10 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-43897

cvss
5.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
7.5%
EPSS 7.5% chance of exploitation in 30 days, percentile 94%
public exploits
1
Exploit-DB, plus a Nuclei check

Summary

The EventON WordPress plugin before 2.1.2 does not validate that the event_id parameter in its eventon_ics_download ajax action is a valid Event, allowing unauthenticated visitors to access any Post (including unpublished or protected posts) content via the ics export functionality by providing the numeric id of the post.

Patch / fix

  • Unknown EventON 2.1.2

Timeline

  1. Published
  2. First public exploit (EDB-51659)

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

7.52% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-51659 Wordpress Plugin EventON Calendar 4.4 - Unauthenticated Post Access via IDOR webapps, 2023-08-04
  • Nuclei template EventON Lite < 2.1.2 - Arbitrary File Download nuclei detection template
  • wpscan.com https://wpscan.com/vulnerability/72d80887-0270-4987-9739-95b1a178c1fd referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

  • Unknown EventON

Classification

Weakness
  • CWE-639 Authorization Bypass Through User-Controlled Key
Technology feeds

References

Sources

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.