Predictable passwords in Jivejdon Sina Weibo OAuth login
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
Jivejdon through 5.0 from banq contains a weak credential flaw in its Sina Weibo OAuth login (CWE-1391). The transferSina() function sets the password of Weibo-created accounts to the first four digits of the Weibo ID, which are predictable. An unauthenticated remote attacker can derive these passwords from public Weibo user IDs and log in through the normal form login to read or post as the victims.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
The sources list no fixed version for Jivejdon.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Timeline
- 2026-10-09 Threatist record created from CVE-2026-107828
- 2026-10-10 CISA SSVC decision points changed
- 2026-10-10 Priority changed: MEDIUM → LOW
References
Other 4
- 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
More banq vulnerabilities
- TI-2026-69782 Jivejdon SMS endpoint lacks rate limiting, allowing unlimited texts CVSS 4.0MEDIUM 6.9
- TI-2026-69781 Unsalted MD5 password storage in Jivejdon CVSS 4.0HIGH 8.2
- TI-2026-69775 Reflected cross-site scripting in Jivejdon postThread.jsp CVSS 4.0MEDIUM 5.3
- TI-2025-43894 SQL injection in Jivejdon user list lets administrators read data CVSS 4.0MEDIUM 6.9
- TI-2026-69774 Reflected cross-site scripting in Jivejdon taggedThreadList.jsp CVSS 4.0MEDIUM 5.3
- TI-2026-69773 Jivejdon lets users delete other users' subscriptions CVSS 4.0MEDIUM 5.3
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences