# CVE-2026-107828: Jivejdon authentication bypass via predictable Weibo credentials

Source: https://junglewise.ai/threats/cve-2026-107828-jivejdon-through-5-0-contains-an-authentication-bypass  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-08. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-107828 · Severity: medium · CVSS 6.5 · Published 2026-10-08

Jivejdon is a notebook and forum application that supports Weibo social login. An authentication bypass vulnerability allows attackers to access any Weibo-linked account without credentials by computing a predictable password from the user's public Weibo ID. Attackers can read or post content as the victim, leading to account takeover and potential data exposure.

Technologies: [Jivejdon Project Jivejdon](https://junglewise.ai/threats/technologies/jivejdon). Vendors: [Jivejdon Project](https://junglewise.ai/threats/vendors/jivejdon-project).

## Quick answers

**Is CVE-2026-107828 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-107828 being exploited in the wild.

**How severe is CVE-2026-107828?** Medium severity, with a CVSS score of 6.5, published 8 October 2026.

**Which products and versions are affected?** Jivejdon Project Jivejdon through 5.0.

**Is there a fix for CVE-2026-107828?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-107828 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-107828?** Check whether you run Jivejdon Project Jivejdon at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The OAuthAccountServiceImp.transferSina() method derives account passwords from the first four digits of public Weibo user IDs and uses these predictable credentials for normal form-based login. Since Weibo user IDs are public information, attackers can enumerate and compromise any linked account over the network without authentication. A fix exists in versions after 5.0.

## Affected products

- Jivejdon Project Jivejdon through 5.0

## Timeline

- 2026-10-08: disclosed

## References

- [https://github.com/banq/jivejdon](https://github.com/banq/jivejdon)
- [https://github.com/banq/jivejdon/blob/ee67a65e65228644a71c8317d7e34deea50f95ef/src/main/java/com/jdon/jivejdon/api/impl/account/OAuthAccountServiceImp.java](https://github.com/banq/jivejdon/blob/ee67a65e65228644a71c8317d7e34deea50f95ef/src/main/java/com/jdon/jivejdon/api/impl/account/OAuthAccountServiceImp.java)

## Related threats

- [Jivejdon stored cross-site scripting in forum messages](https://junglewise.ai/threats/cve-2026-107799-jivejdon-through-5-0-contains-a-stored-cross-site-scripting)