CVE-2025-23041 | Short and Long Answer Fields Are Not Validated Server-Side For Maximum Length in Umbraco.Forms

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.

Published: 2025-01-14 Last update: 2025-09-19 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-23041 is rated Low Risk (37/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.18%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-23041

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-02-23 0.15% 0.18% +0.03%
2 2025-11-21 0.19% 0.15% -0.04%
3 2025-11-18 — 0.19% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-23041

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.8 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 [email protected]
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 1.4 [email protected]

Weakness enumeration for CVE-2025-23041

GitHub Security Advisory for CVE-2025-23041

GHSA-9v8m-qv22-f268 · Severity: medium · Ecosystem: nuget — Umbraco Forms's Short and Long Answer Fields Are Not Validated Server-Side For Maximum Length

Affected software / configurations for CVE-2025-23041

Vendor Product Version Raw CPE
umbraco umbraco_forms < 8.13.15 cpe:2.3:a:umbraco:umbraco_forms:*:*:*:*:*:*:*:*
umbraco umbraco_forms >= 10.0.0, < 10.5.7 cpe:2.3:a:umbraco:umbraco_forms:*:*:*:*:*:*:*:*
umbraco umbraco_forms >= 13.0.0, < 13.2.2 cpe:2.3:a:umbraco:umbraco_forms:*:*:*:*:*:*:*:*
umbraco umbraco_forms >= 14.0.0, < 14.1.2 cpe:2.3:a:umbraco:umbraco_forms:*:*:*:*:*:*:*:*

References for CVE-2025-23041

cvelogic Threat Intelligence