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.
References (1)
Core 1
Core References
Vendor Advisory x_refsource_confirm
https://github.com/open-formulieren/open-forms/security/advisories/GHSA-2g49-rfm6-5qj5
Scores
CVSS v3
6.5
EPSS
0.0020
EPSS Percentile
10.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-284
Status
published
Products (1)
maykinmedia/open_forms
< 3.3.13
Published
Mar 11, 2026
Tracked Since
Mar 11, 2026