CVE-2026-33423
Last modified
CVE-2026-33423 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, staff can modify any user's group notification level. EPSS estimates a 0.20% chance of exploitation in the next 30 days.
Description
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, staff can modify any user's group notification level. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Discourse | Discourse | >= 2026.1.0, < 2026.1.2 |
| Discourse | Discourse | >= 2026.2.0, < 2026.2.1 |
| Discourse | Discourse | 2026.3.0 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-33423?
How severe is CVE-2026-33423?
How do I fix CVE-2026-33423?
How Strix Helps
- Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-33418DiceBear is an avatar library for designers and developers. …7.5
- CVE-2026-33419MinIO is a high-performance object storage system. Prior to …7.5
- CVE-2026-3342An Out-of-bounds Write vulnerability in WatchGuard Fireware …7.2
- CVE-2026-33420Vaultwarden is a Bitwarden-compatible server written in Rust…5.3
- CVE-2026-33421Parse Server is an open source backend that can be deployed …6.5
- CVE-2026-33422Discourse is an open-source discussion platform. Prior to ve…4.3
- CVE-2026-33424Discourse is an open-source discussion platform. Prior to ve…4.3
- CVE-2026-33425Discourse is an open-source discussion platform. Prior to ve…5.3
- CVE-2026-33426Discourse is an open-source discussion platform. Prior to ve…3.8
- CVE-2026-33427Discourse is an open-source discussion platform. Prior to ve…7.5
- CVE-2026-33428Discourse is an open-source discussion platform. Prior to ve…6.5
- CVE-2026-33429Parse Server is an open source backend that can be deployed …5.3
Are you affected by CVE-2026-33423?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST