CVE-2021-41163
In affected versions maliciously crafted requests could lead to remote code execution.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 19.8%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
Description
Discourse is an open source platform for community discussion. In affected versions maliciously crafted requests could lead to remote code execution. This resulted from a lack of validation in subscribe_url values. This issue is patched in the latest stable, beta and tests-passed versions of Discourse. To workaround the issue without updating, requests with a path starting /webhooks/aws path could be blocked at an upstream proxy.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 19.81% probability · 97th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-74
- Affected
- discourse/discourse
- Source
- security-advisories@github.com
EPSS 19.8% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/discourse/discourse/commit/fa3c46cf079d28b086fe1025349bb00223a5d5e9Patch, Third Party Advisory
- https://github.com/discourse/discourse/security/advisories/GHSA-jcjx-pvpc-qgwqThird Party Advisory
- https://github.com/discourse/discourse/commit/fa3c46cf079d28b086fe1025349bb00223a5d5e9Patch, Third Party Advisory
- https://github.com/discourse/discourse/security/advisories/GHSA-jcjx-pvpc-qgwqThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.