PT-2023-22808 · Discourse · Discourse-Reactions

Name of the Vulnerable Software and Affected Versions: Discourse-reactions versions prior to 0.3 Description: The Discourse-reactions plugin for the Discourse messaging platform has an issue where data about reactions performed on a post in a private topic could be leaked. This affects the...

CVE-2023-30538

Discourse is an open source platform for community discussion. Due to the improper sanitization of SVG files, an attacker can execute arbitrary JavaScript on the users’ browsers by uploading a crafted SVG file. This issue is patched in the latest stable and tests-passed versions of Discourse. Use...

CVE-2023-29196

Discourse is an open source platform for community discussion. This vulnerability is not exploitable on the default install of Discourse. A custom feature must be enabled for it to work at all, and the attacker’s payload must pass the CSP to be executed. However, if an attacker succeeds in...

Default configuration

Discourse is an open source platform for community discussion. Due to the improper sanitization of SVG files, an attacker can execute arbitrary JavaScript on the users’ browsers by uploading a crafted SVG file. This issue is patched in the latest stable and tests-passed versions of Discourse. Use...

CVE-2023-30606 Multisite denial of service through unsanitized dynamic dispatch to SiteSetting in Discourse

Discourse is an open source platform for community discussion. In affected versions a user logged as an administrator can call arbitrary methods on the SiteSetting class, notably clearcache! and notifychanged!, which when done on a multisite instance, can affect the entire cluster resulting in a...

CVE-2023-30606 Multisite denial of service through unsanitized dynamic dispatch to SiteSetting in Discourse

Discourse is an open source platform for community discussion. In affected versions a user logged as an administrator can call arbitrary methods on the SiteSetting class, notably clearcache! and notifychanged!, which when done on a multisite instance, can affect the entire cluster resulting in a...

CVE-2023-30606

CVE-2023-30606 affects Discourse where an administrator can call arbitrary methods on SiteSetting (notably clear_cache! and notify_changed!) in multisite deployments, potentially affecting the entire cluster and causing denial of service. Affected versions are mitigated by upgrading to the latest...

CVE-2023-30606 Multisite denial of service through unsanitized dynamic dispatch to SiteSetting in Discourse

Discourse is an open source platform for community discussion. In affected versions a user logged as an administrator can call arbitrary methods on the SiteSetting class, notably clearcache! and notifychanged!, which when done on a multisite instance, can affect the entire cluster resulting in a...

CVE-2023-30538 Stored Cross-site Scripting via improper sanitization of svg files in Discourse

Discourse is an open source platform for community discussion. Due to the improper sanitization of SVG files, an attacker can execute arbitrary JavaScript on the users’ browsers by uploading a crafted SVG file. This issue is patched in the latest stable and tests-passed versions of Discourse. Use...

CVE-2023-30538

CVE-2023-30538 affects the Discourse open source platform. The issue results from improper sanitization of SVG files, allowing an attacker to execute arbitrary JavaScript in users’ browsers when uploading a crafted SVG. The vulnerability is mitigated in the latest stable and tests-passed Discours...

CVE-2023-30538 Stored Cross-site Scripting via improper sanitization of svg files in Discourse

Discourse is an open source platform for community discussion. Due to the improper sanitization of SVG files, an attacker can execute arbitrary JavaScript on the users’ browsers by uploading a crafted SVG file. This issue is patched in the latest stable and tests-passed versions of Discourse. Use...

CVE-2023-29196 HTML injection via topic embedding in Discourse

Discourse is an open source platform for community discussion. This vulnerability is not exploitable on the default install of Discourse. A custom feature must be enabled for it to work at all, and the attacker’s payload must pass the CSP to be executed. However, if an attacker succeeds in...

CVE-2023-29196 HTML injection via topic embedding in Discourse

Discourse is an open source platform for community discussion. This vulnerability is not exploitable on the default install of Discourse. A custom feature must be enabled for it to work at all, and the attacker’s payload must pass the CSP to be executed. However, if an attacker succeeds in...

CVE-2023-29196

CVE-2023-29196 affects Discourse. Not exploitable on default install; a custom feature must be enabled and the attacker’s payload must pass CSP to run. If JavaScript passes CSP, it could enable session hijacking for users viewing the attacker’s post. The issue is patched in the latest tests-passe...

CVE-2023-29196 HTML injection via topic embedding in Discourse

Discourse is an open source platform for community discussion. This vulnerability is not exploitable on the default install of Discourse. A custom feature must be enabled for it to work at all, and the attacker’s payload must pass the CSP to be executed. However, if an attacker succeeds in...

CVE-2023-28440

Discourse is an open source platform for community discussion. In affected versions a maliciously crafted request from a Discourse administrator can lead to a long-running request and eventual timeout. This has the greatest potential impact in shared hosting environments where admins are untruste...

Design/Logic Flaw

Discourse is an open source platform for community discussion. In affected versions a maliciously crafted request from a Discourse administrator can lead to a long-running request and eventual timeout. This has the greatest potential impact in shared hosting environments where admins are untruste...

CVE-2023-28440 Denial of service via admin theme import route in Discourse

Discourse is an open source platform for community discussion. In affected versions a maliciously crafted request from a Discourse administrator can lead to a long-running request and eventual timeout. This has the greatest potential impact in shared hosting environments where admins are untruste...

CVE-2023-28440

CVE-2023-28440 affects Discourse: an admin-authenticated request can trigger a long-running operation, leading to a denial of service (availability impact) in affected builds. Public records identify the vulnerability as a Denial of Service via the admin theme import route, with mitigation by upg...

CVE-2023-28440 Denial of service via admin theme import route in Discourse

Discourse is an open source platform for community discussion. In affected versions a maliciously crafted request from a Discourse administrator can lead to a long-running request and eventual timeout. This has the greatest potential impact in shared hosting environments where admins are untruste...