Jivejdon through 5.0 Predictable Passwords via Sina Weibo OAuth Login

Advisories

Jivejdon through 5.0 Predictable Passwords via Sina Weibo OAuth Login

severity: medium
date: 10/8/2026
Affecting: jivejdon <= 5.0
CVE: CVE-2026-107828
CWE: CWE-1391 Use of Weak Credentials
CVSS: 6.9
CVSS V4 Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
References: GitHub Issue #28
https://github.com/banq/jivejdon
https://github.com/banq/jivejdon/blob/ee67a65e65228644a71c8317d7e34deea50f95ef/src/main/java/com/jdon/jivejdon/api/impl/account/OAuthAccountServiceImp.java#L192-L213
https://github.com/banq/jivejdon/blob/ee67a65e65228644a71c8317d7e34deea50f95ef/src/main/java/com/jdon/jivejdon/presentation/action/account/oauth/SinaUserCallBackAction.java#L76-L80
Credit: Ikram-4
Description: Jivejdon through 5.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to access Weibo-created accounts by deriving predictable credentials from public Weibo user IDs. OAuthAccountServiceImp.transferSina() sets the password to the first four digits of the Weibo ID, letting attackers log in through normal form login to read or post as victims.

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