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Fencer Intel
medium 5.8

CVE-2025-23041 json

Short and Long Answer Fields Are Not Validated Server-Side For Maximum Length in Umbraco.Forms

published last yr. modified 4mo ago also EUVD-2025-0070 , GHSA-9v8m-qv22-f268

cvss
5.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 33%
public exploits
0
none known

Summary

Umbraco.Forms is a web form framework written for the nuget ecosystem. Character limits configured by editors for short and long answer fields are validated only client-side, not server-side. This issue has been patched in versions 8.13.16, 10.5.7, 13.2.2, and 14.1.2. Users are advised to upgrade. There are no known workarounds for this issue.

Patch / fix

  • nuget Umbraco.Forms 10.5.7, 13.2.2, 14.1.2
  • nuget UmbracoForms 8.13.16
  • umbraco umbraco_forms 8.13.16, 10.5.7, 13.2.2, 14.1.2

Is CVE-2025-23041 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 5.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
GitHub 3.1 5.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
NVD 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
nuget Umbraco.Forms
<10.5.7
>=11.0.0-rc1, <13.2.2
>=14.0.0-beta001, <14.1.2
10.5.7
13.2.2
14.1.2
nuget UmbracoForms
<8.13.16
8.13.16

Affected products

  • umbraco Umbraco.Forms.Issues

Classification

Weakness
  • CWE-20 Improper Input Validation
  • CWE-602 Client-Side Enforcement of Server-Side Security

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.