CVE-2026-30927

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Source
https://cve.org/CVERecord?id=CVE-2026-30927
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-30927.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-30927
Aliases
Published
2026-03-09T23:03:55.824Z
Modified
2026-04-10T05:42:01.325271Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
Admidio: Event participation IDOR - non-leaders can register other users for events via user_uuid parameter
Details

Admidio is an open-source user management solution. Prior to 5.0.6, in modules/events/eventsfunction.php, the event participation logic allows any user who can participate in an event to register OTHER users by manipulating the useruuid GET parameter. The condition uses || (OR), meaning if possibleToParticipate() returns true (event is open for participation), ANY user - not just leaders - can specify a different useruuid and register/cancel participation for that user. The code then operates on $user->getValue('usrid') (the target user from user_uuid) rather than the current user. This vulnerability is fixed in 5.0.6.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30927.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-639"
    ]
}
References

Affected packages

Git / github.com/admidio/admidio

Affected ranges

Type
GIT
Repo
https://github.com/admidio/admidio
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
e11799f647188263196de4acacf80c9a5ad32b91

Affected versions

3.*
3.0-Beta.1
3.0-Beta.3
v3.*
v3.0.6
v3.1.5
v3.2-Beta.1
Other
v34
v4.*
v4.0-Beta.1
v4.1-Beta.2
v4.3-Beta.1
v5.*
v5.0-Beta.1
v5.0-Beta.2
v5.0-Beta.3
v5.0.0
v5.0.1
v5.0.2
v5.0.3
v5.0.4
v5.0.5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-30927.json"