CVE-2026-28803

Published: Mar 11, 2026 Last Modified: Mar 17, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 6,5
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: none
Availability: none

Description

AI Translation Available

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.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0003
Percentile
0,1th
Updated

EPSS Score Trend (Last 6 Days)

284

Improper Access Control

Incomplete
Abstraction: Pillar Structure: Simple
Common Consequences
Security Scopes Affected:
Other
Potential Impacts:
Varies By Context
Applicable Platforms
Technologies: ICS/OT, Not Technology-Specific, Web Based
View CWE Details
Application

Open Forms by Maykinmedia

Product Information
Vendor Maykinmedia
Product Open Forms
Version Range Affected
To 3.3.13 (exclusive)
cpe:2.3:a:maykinmedia:open_forms:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
Application

Open Forms by Maykinmedia

Product Information
Vendor Maykinmedia
Product Open Forms
Version Range Affected
From 3.4.0 (inclusive)
To 3.4.5 (exclusive)
cpe:2.3:a:maykinmedia:open_forms:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://github.com/open-formulieren/open-forms/security/adv…
https://github.com/open-formulieren/open-forms/security/advisories/GHSA-2g49-rf…