ByteOS Network

NVD Vulnerability Details :

CVE-2026-43939

Deferred

Source-security-advisories@github.com

Published At-12 May, 2026 | 15:16

Updated At-13 May, 2026 | 18:24

YetAnotherForum.NET (YAF.NET) is a C# ASP.NET forum. Prior to 4.0.5 and 3.2.12, the thread posting and reply feature accepts user-supplied content via a a post or reply that is stored server-side and later rendered back into the thread page without adequate HTML sanitization or contextual output encoding. This vulnerability is fixed in 4.0.5 and 3.2.12.

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Secondary	3.1	7.3	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Type: Secondary

Version: 3.1

Base score: 7.3

Base severity: HIGH

Vector:

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Weaknesses

CWE ID	Type	Source
CWE-79	Secondary	security-advisories@github.com
CWE-80	Secondary	security-advisories@github.com
CWE-116	Secondary	security-advisories@github.com

CWE ID: CWE-79

Type: Secondary

Source: security-advisories@github.com

CWE ID: CWE-80

Type: Secondary

Source: security-advisories@github.com

CWE ID: CWE-116

Type: Secondary

Source: security-advisories@github.com

References

Hyperlink	Source	Resource
https://github.com/YAFNET/YAFNET/security/advisories/GHSA-8rq5-wwpp-fmj2	security-advisories@github.com	N/A
https://github.com/YAFNET/YAFNET/security/advisories/GHSA-8rq5-wwpp-fmj2	134c704f-9b21-4f2e-91b3-4a467353bcc0	N/A

Hyperlink: https://github.com/YAFNET/YAFNET/security/advisories/GHSA-8rq5-wwpp-fmj2

Source: security-advisories@github.com

Resource: N/A

Hyperlink: https://github.com/YAFNET/YAFNET/security/advisories/GHSA-8rq5-wwpp-fmj2

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

Resource: N/A

CISA Catalog

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Change History