CVSS: 4.9EPSS: 0%CPEs: 4EXPL: 0CVE-2023-30606 – Multisite denial of service through unsanitized dynamic dispatch to SiteSetting in Discourse
https://notcve.org/view.php?id=CVE-2023-30606
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 `#clear_cache!` and `#notify_changed!`, which when done on a multisite instance, can affect the entire cluster resulting in a denial of service. Users not running in multisite environments are not affected. • https://github.com/discourse/discourse/security/advisories/GHSA-jj93-w3mv-3jvv • CWE-732: Incorrect Permission Assignment for Critical Resource •
CVSS: 5.4EPSS: 0%CPEs: 5EXPL: 0CVE-2023-30538 – Stored Cross-site Scripting via improper sanitization of svg files in Discourse
https://notcve.org/view.php?id=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. Users are advised to upgrade. For users unable to upgrade there are two possible workarounds: enable CDN handing of uploads (and ensure the CDN sanitizes SVG files) or disable SVG file uploads by ensuring that the `authorized extensions` site setting does not include `svg` (or reset that setting to the default, by default Discourse doesn't enable SVG uploads by users). • https://github.com/discourse/discourse/security/advisories/GHSA-w5mv-4pjf-xj43 • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') •
CVSS: 6.1EPSS: 0%CPEs: 5EXPL: 0CVE-2023-29196 – HTML injection via topic embedding in Discourse
https://notcve.org/view.php?id=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 embedding Javascript that does pass the CSP, it could result in session hijacking for any users that view the attacker’s post. The vulnerability is patched in the latest tests-passed, beta and stable branches. • https://github.com/discourse/discourse/security/advisories/GHSA-986p-4x8q-8f48 • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') •
CVSS: 2.7EPSS: 0%CPEs: 210EXPL: 0CVE-2023-28440 – Denial of service via admin theme import route in Discourse
https://notcve.org/view.php?id=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 untrusted. This issue has been addressed in versions 3.0.3 and 3.1.0.beta4. Users are advised to upgrade. • https://github.com/discourse/discourse/security/advisories/GHSA-vm65-pv5h-6g3w • CWE-400: Uncontrolled Resource Consumption •
CVSS: 8.1EPSS: 0%CPEs: 4EXPL: 0CVE-2023-28112 – Discourse's SSRF protection missing for some FastImage requests
https://notcve.org/view.php?id=CVE-2023-28112
Discourse is an open-source discussion platform. Prior to version 3.1.0.beta3 of the `beta` and `tests-passed` branches, some user provided URLs were being passed to FastImage without SSRF protection. Insufficient protections could enable attackers to trigger outbound network connections from the Discourse server to private IP addresses. This affects any site running the `tests-passed` or `beta` branches versions 3.1.0.beta2 and prior. This issue is patched in version 3.1.0.beta3 of the `beta` and `tests-passed` branches. • https://github.com/discourse/discourse/commit/39c2f63b35d90ebaf67b9604cf1d424e5984203c https://github.com/discourse/discourse/pull/20710 https://github.com/discourse/discourse/security/advisories/GHSA-9897-x229-55gh • CWE-918: Server-Side Request Forgery (SSRF) •