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CVE-2026-46353

BigBlueButton is an open-source virtual classroom. Prior to 3.0.21, bbb-web checksum validation could be bypassed when a presentationUploadExternalUrl parameter was supplied to API request handling in CreateMeeting.java and ValidationService.java, allowing a user to send valid requests to some endpoints without a checksum. This issue is fixed in version 3.0.21.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8f90f9f6112220475a846ad3dd60c495b64b97b13036474de9e563d3482f1bb7
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"bigbluebutton","vendor":"bigbluebutton","versions":[{"status":"affected","version":"< 3.0.21"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:47b60a7d7c0fe9c98aa35063cee3531df49d39b83842b92451abcca057a34b29 · sha256:4b00d75abaae80dc… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:47b60a7d7c0fe9c98aa35063cee3531df49d39b83842b92451abcca057a34b29 · sha256:4b00d75abaae80dc… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-284","description":"CWE-284: Improper Access Control","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:47b60a7d7c0fe9c98aa35063cee3531df49d39b83842b92451abcca057a34b29 · sha256:4b00d75abaae80dc… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/bigbluebutton/bigbluebutton/commit/36fd1b407488a0c56ce620b91184d5a8aea68b3d","tags":["x_refsource_MISC"],"url":"https://github.com/bigbluebutton/bigbluebutton/commit/36fd1b407488a0c56ce620b91184d5a8aea68b3d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:47b60a7d7c0fe9c98aa35063cee3531df49d39b83842b92451abcca057a34b29 · sha256:4b00d75abaae80dc… · /containers/cna/references/1
{"name":"https://github.com/bigbluebutton/bigbluebutton/releases/tag/v3.0.21","tags":["x_refsource_MISC"],"url":"https://github.com/bigbluebutton/bigbluebutton/releases/tag/v3.0.21"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:47b60a7d7c0fe9c98aa35063cee3531df49d39b83842b92451abcca057a34b29 · sha256:4b00d75abaae80dc… · /containers/cna/references/2
{"name":"https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-43hc-5g2m-cqff","tags":["x_refsource_CONFIRM"],"url":"https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-43hc-5g2m-cqff"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:47b60a7d7c0fe9c98aa35063cee3531df49d39b83842b92451abcca057a34b29 · sha256:4b00d75abaae80dc… · /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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