TI-2023-26764 Aliases CVE-2023-49099

Discourse secure uploads accessible to guests even when login is required

LOW 20CWE-284Published 2024-01-12 · Updated 2025-06-17

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-284.

Summary

Discourse is a platform for community discussion. Under very specific circumstances, secure upload URLs associated with posts can be accessed by guest users even when login is required. This vulnerability has been patched in 3.2.0.beta4 and 3.1.4.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00321 25th percentileScored 2026-11-07

Fix Fixed discourse (discourse): 3.1.4, 3.2.0.beta4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
discourse	discourse	before 3.1.4; 3.2.0beta1 to before 3.2.0.beta4	3.1.4, 3.2.0.beta4	Patch available	CNA

discourse Vendordiscourse Affected before 3.1.4; 3.2.0beta1 to before 3.2.0.beta4 Fixed in 3.1.4, 3.2.0.beta4 Patch available CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:a:discourse:discourse:::::stable:::*	before 3.1.4	Vulnerable	discourse
cpe:2.3:a:discourse:discourse:3.2.0:beta1:::beta:::*	3.2.0 beta1	Vulnerable	discourse
cpe:2.3:a:discourse:discourse:3.2.0:beta2:::beta:::*	3.2.0 beta2	Vulnerable	discourse
cpe:2.3:a:discourse:discourse:3.2.0:beta3:::beta:::*	3.2.0 beta3	Vulnerable	discourse

cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:* Versions before 3.1.4 Vulnerable ·discourse
cpe:2.3:a:discourse:discourse:3.2.0:beta1:*:*:beta:*:*:* Versions 3.2.0 beta1 Vulnerable ·discourse
cpe:2.3:a:discourse:discourse:3.2.0:beta2:*:*:beta:*:*:* Versions 3.2.0 beta2 Vulnerable ·discourse
cpe:2.3:a:discourse:discourse:3.2.0:beta3:*:*:beta:*:*:* Versions 3.2.0 beta3 Vulnerable ·discourse

Remediation

Fix · CNA discourse (discourse) Fixed in 3.1.4, 3.2.0.beta4

Timeline

2026-10-02 Threatist record created from CVE-2023-49099

References

Patch 1

https://github.com/discourse/discourse/commit/1b288236387fc0a823e4f15f1aea8dde81b49d53

Advisory 1

https://github.com/discourse/discourse/security/advisories/GHSA-j67x-x6mq-pwv4

TI-2021-19656 Denial of Service in discourse CVSS 3.1MEDIUM 6.8
TI-2024-36150 Potential Backup file leaked via Nginx in Discourse CVSS 3.1HIGH 7.5
TI-2021-18002 RCE via malicious SNS subscription payload CVSS 3.1CRITICAL 10.0
TI-2026-24651 Discourse: Open redirect via `sso_destination_url` cookie in `enter` CVSS 4.0MEDIUM 5.1
TI-2026-22278 Discourse leaks private topic title and post excerpt via user action API endpoint CVSS 4.0HIGH 8.7
TI-2023-24152 Unauthenticated access to new private chat messages in Discourse CVSS 3.1HIGH 7.5

See all 262 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences