CVE-2026-75339: CVE-2026-75339 affects cjbi admin3 · Missing Authorization
Source CVE Database V5
Not known to be exploited · CVSS 8.8 High.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 35% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 27 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
Until an official fix is available, restrict access to the /storage/upload endpoint through network controls or application-level access restrictions to prevent unauthorized uploads and downloads.
Description
CVE-2026-75339 affects cjbi admin3 version 3.0.0, where the storage endpoint /storage/upload lacks proper permission checks. This flaw allows any logged-in user to upload arbitrary files and permits anonymous attackers to download those files. The vulnerability has a high severity with a CVSS score of 8.8, indicating a significant risk to confidentiality, integrity, and availability.