All vulnerabilities
CVE-2026-109167

tduck-survey-form: TDuck survey form through 6.0 Authorization Bypass via User-Controlled Theme ID in POST /user/form/theme/save

TDuckCloud tduck-survey-form
Open in ThreatlineRecord JSON
CVSS
5.3Medium
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 14 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.19%Chance of exploitation activity in the next 30 days, higher than 8% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published12 Oct 2026Updated 14 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Description

TDuck survey form through 6.0 contains an insecure direct object reference vulnerability in the saveFormTheme handler that allows authenticated users to overwrite other users' form themes. Attackers whose form has no theme can submit another form's sequential theme id with their own formKey, replacing its colours and image URLs and removing the victim's theme.

Text from CVE List

Affected versions 1

  • tduck-survey-formaffected: all versions through 6.0CVE List

References 3