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CVE-2026-30927

Admidio is an open-source user management solution. Prior to 5.0.6, in modules/events/events_function.php, the event participation logic allows any user who can participate in an event to register OTHER users by manipulating the user_uuid 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 user_uuid and register/cancel participation for that user. The code then operates
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:a5a9ba8c6dc585f1c9154b0a5325ce749f4bb4ab2e23198c784fc94d53e7ff8f
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"admidio","vendor":"Admidio","versions":[{"status":"affected","version":"< 5.0.6"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:c6bc278194c7df05a7239cf90e66904bf3690cea6ecfd08f68f58449fdfd6376 · sha256:d727e8883eacb3fa… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:c6bc278194c7df05a7239cf90e66904bf3690cea6ecfd08f68f58449fdfd6376 · sha256:d727e8883eacb3fa… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-639","description":"CWE-639: Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:c6bc278194c7df05a7239cf90e66904bf3690cea6ecfd08f68f58449fdfd6376 · sha256:d727e8883eacb3fa… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/Admidio/admidio/commit/e47f70cc3cbcdb39635fdbaaef02d19f604b8c3e","tags":["x_refsource_MISC"],"url":"https://github.com/Admidio/admidio/commit/e47f70cc3cbcdb39635fdbaaef02d19f604b8c3e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c6bc278194c7df05a7239cf90e66904bf3690cea6ecfd08f68f58449fdfd6376 · sha256:d727e8883eacb3fa… · /containers/cna/references/2
{"name":"https://github.com/Admidio/admidio/issues/1985","tags":["x_refsource_MISC"],"url":"https://github.com/Admidio/admidio/issues/1985"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c6bc278194c7df05a7239cf90e66904bf3690cea6ecfd08f68f58449fdfd6376 · sha256:d727e8883eacb3fa… · /containers/cna/references/1
{"name":"https://github.com/Admidio/admidio/security/advisories/GHSA-7pfv-hr63-h7cw","tags":["x_refsource_CONFIRM"],"url":"https://github.com/Admidio/admidio/security/advisories/GHSA-7pfv-hr63-h7cw"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:c6bc278194c7df05a7239cf90e66904bf3690cea6ecfd08f68f58449fdfd6376 · sha256:d727e8883eacb3fa… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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