Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Umbraco.Forms versions from 8.0.0 before 8.13.13, from 10.0.0 before 10.5.3, from 12.0.0 before 12.2.2, and from 13.0.0 before 13.0.1 are affected by stored cross-site scripting in Forms components. An authenticated user who can edit Forms can inject unsafe code into those components. Upgrade to 8.13.13, 10.5.3, 12.2.2, or 13.0.1 depending on your version. The source suggests that setting TitleAndDescription:AllowUnsafeHtmlRendering can also mitigate the issue.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 2.7 | Low | 3.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0034, the 27th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:22 UTC First seen by agentprime
- 31 Oct 2026, 15:22 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-p572-p2rj-q5f4
- OSV: GHSA-p572-p2rj-q5f4
- github.com/umbraco/Umbraco.Forms.Issues/security/advisories/GHSA-p572-p2rj-q5f4
- nvd.nist.gov/vuln/detail/CVE-2024-35239
- docs.umbraco.com/umbraco-forms/developer/configuration#editing-configuration-values
- docs.umbraco.com/umbraco-forms/release-notes#id-13.0.1-january-16th-2024
- docs.umbraco.com/umbraco-forms/v/10.forms.latest/release-notes
- docs.umbraco.com/umbraco-forms/v/10.forms.latest/release-notes#version-8
- docs.umbraco.com/umbraco-forms/v/12.forms.latest/release-notes#id-12.2.2-january-16th-2024
- github.com/umbraco/Umbraco.Forms.Issues