Vulnerability · Published Jul 10, 2025 · Assigned by GitHub_M

CVE-2025-53371DiscordNotifications allows DOS, SSRF, and possible RCE through requests to user-controlled URLs

Critical 9.1

In plain English

A critical-severity uncontrolled resource consumption in DiscordNotifications from miraheze. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).

Severity (CVSS 3.1)9.1Critical

Exploit odds (30 days)0.4%top 67.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
miraheze	DiscordNotifications	< 1f20d850cbcce5b15951c7c6127b87b927a5415e

Weakness: CWE-400, CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H

References

https://github.com/miraheze/DiscordNotifications/security/advisories/GHSA-gvfx-p3h5-qf65 x_refsource_CONFIRM
https://github.com/miraheze/DiscordNotifications/commit/1f20d850cbcce5b15951c7c6127b87b927a5415e x_refsource_MISC