{"id":"CVE-2026-28803","state":"PUBLISHED","title":"Open Forms possible to view submission details of other people than intended","description":"Open Forms allows users create and publish smart forms. Prior to 3.3.13 and 3.4.5, to be able to cosign, the cosigner receives an e-mail with instructions or a deep-link to start the cosign flow. The submission reference is communicated so that the user can retrieve the submission to be cosigned. Attackers can guess a code or modify the received code to look up arbitrary submissions, after logging in (with DigiD/eHerkenning/... depending on form configuration). This vulnerability is fixed in 3.3.13 and 3.4.5.","publishedAt":"2026-03-11T15:52:08.464Z","updatedAt":"2026-03-11T17:30:48.578Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["open-formulieren open-forms"],"affected":[{"vendor":"open-formulieren","product":"open-forms","versions":[{"version":">= 3.4.0-alpha.0, < 3.4.5","status":"affected"},{"version":"< 3.3.13","status":"affected"}]}],"references":["https://github.com/open-formulieren/open-forms/security/advisories/GHSA-2g49-rfm6-5qj5"],"weaknesses":["CWE-284"],"ingestedAt":"2026-10-29T20:11:31.369Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/28xxx/CVE-2026-28803.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-28803","state":"PUBLISHED","datePublished":"2026-03-11T15:52:08.464Z","dateUpdated":"2026-03-11T17:30:48.578Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-03T14:25:19.246Z"},"containers":{"cna":{"title":"Open Forms possible to view submission details of other people than intended","descriptions":[{"lang":"en","value":"Open Forms allows users create and publish smart forms. Prior to 3.3.13 and 3.4.5, to be able to cosign, the cosigner receives an e-mail with instructions or a deep-link to start the cosign flow. The submission reference is communicated so that the user can retrieve the submission to be cosigned. Attackers can guess a code or modify the received code to look up arbitrary submissions, after logging in (with DigiD/eHerkenning/... depending on form configuration). This vulnerability is fixed in 3.3.13 and 3.4.5."}],"affected":[{"vendor":"open-formulieren","product":"open-forms","versions":[{"version":">= 3.4.0-alpha.0, < 3.4.5","status":"affected"},{"version":"< 3.3.13","status":"affected"}]}],"references":[{"url":"https://github.com/open-formulieren/open-forms/security/advisories/GHSA-2g49-rfm6-5qj5","name":"https://github.com/open-formulieren/open-forms/security/advisories/GHSA-2g49-rfm6-5qj5","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-284","lang":"en","description":"CWE-284: Improper Access Control","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-03-11T15:52:08.464Z"},"source":{"advisory":"GHSA-2g49-rfm6-5qj5","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-11T17:30:34.864496Z","id":"CVE-2026-28803","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-11T17:30:48.578Z"}}]}}}