Multiple vulnerabilities in Discourse



Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2024-53266
CVE-2024-53994
CVE-2024-53851
CWE-ID CWE-79
CWE-281
CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Discourse
Web applications / Forum & blogging software

Vendor Civilized Discourse Construction Kit, Inc.

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Cross-site scripting

EUVDB-ID: #VU103633

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-53266

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data within topic titles when CSP disabled. A remote user can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Discourse: 3.3.0 beta1 - 3.4.0 beta3

CPE2.3 External links

http://github.com/discourse/discourse/security/advisories/GHSA-hw4j-4hg7-22h2


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Improper Preservation of Permissions

EUVDB-ID: #VU103642

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-53994

CWE-ID: CWE-281 - Improper preservation of permissions

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to improper preservation of permissions. A remote user with disable chat in preferences can still be reachable in some cases.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Discourse: 3.3.0 beta1 - 3.4.0 beta3

CPE2.3 External links

http://github.com/discourse/discourse/security/advisories/GHSA-mrpw-gwj7-98r6


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Input validation error

EUVDB-ID: #VU103636

Risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-53851

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in inline oneboxes. A remote user can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Discourse: 3.3.0 beta1 - 3.4.0 beta3

CPE2.3 External links

http://github.com/discourse/discourse/commit/416ec83ae57924d721e6e374f4cda78bd77a4599
http://github.com/discourse/discourse/security/advisories/GHSA-49rv-574x-wgpc


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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