CVE-2021-43794
Discourse Cache Poisoning Vulnerability
Description
Discourse is an open source discussion platform. In affected versions an attacker can poison the cache for anonymous (i.e. not logged in) users, such that the users are shown a JSON blob instead of the HTML page. This can lead to a partial denial-of-service. This issue is patched in the latest stable, beta and tests-passed versions of Discourse.
INFO
Published Date :
Dec. 1, 2021, 8:15 p.m.
Last Modified :
Dec. 3, 2021, 3:11 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-43794.
| URL | Resource |
|---|---|
| https://github.com/discourse/discourse/commit/2da0001965c6d8632d723c46ea5df9f22a1a23f1 | Patch Third Party Advisory |
| https://github.com/discourse/discourse/security/advisories/GHSA-249g-pc77-65hp | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-43794 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-43794 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Dec. 03, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Changed Reference Type https://github.com/discourse/discourse/commit/2da0001965c6d8632d723c46ea5df9f22a1a23f1 No Types Assigned https://github.com/discourse/discourse/commit/2da0001965c6d8632d723c46ea5df9f22a1a23f1 Patch, Third Party Advisory Changed Reference Type https://github.com/discourse/discourse/security/advisories/GHSA-249g-pc77-65hp No Types Assigned https://github.com/discourse/discourse/security/advisories/GHSA-249g-pc77-65hp Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:* versions up to (excluding) 2.7.11
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-43794 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-43794
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.10 }} 0.01%
score
0.43631
percentile