CVE-2025-53371 DiscordNotifications allows DOS, SSRF, and possible RCE through requests to user-controlled URLs
Attackers can trigger SSRF and DoS via arbitrary URLs in DiscordNotifications, potentially leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-53371?
CVE-2025-53371 is a critical server-side request forgery vulnerability in miraheze DiscordNotifications, published on 10 Jul 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
DiscordNotifications is an extension for MediaWiki that sends notifications of actions in your Wiki to a Discord channel. DiscordNotifications allows sending requests via curl and file_get_contents to arbitrary URLs set via $wgDiscordIncomingWebhookUrl and $wgDiscordAdditionalIncomingWebhookUrls. This allows for DOS by causing the server to read large files. SSRF is also possible if there are internal unprotected APIs that can be accessed using HTTP POST requests, which could also possibly lead to RCE. This vulnerability is fixed in commit 1f20d850cbcce5b15951c7c6127b87b927a5415e.
Which versions are affected by CVE-2025-53371?
How do I fix CVE-2025-53371?
No fix has been published for CVE-2025-53371 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2025-53371 being exploited?
There is no known exploitation of CVE-2025-53371 in the wild and no public exploit code.
Sources
Also known as GHSA-gvfx-p3h5-qf65.