Skip to content

[GHSA-54mj-vcvj-q3v5] Umbraco CMS has an arbitrary file upload vulnerability #6633

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
legacy-git wants to merge 1 commit into
base: legacy-git/advisory-improvement-6633
Choose a base branch
from
+3 −7
Open

[GHSA-54mj-vcvj-q3v5] Umbraco CMS has an arbitrary file upload vulnerability #6633

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
10 changes: 3 additions & 7 deletions advisories/github-reviewed/2025/12/GHSA-54mj-vcvj-q3v5/GHSA-54mj-vcvj-q3v5.json
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,21 +1,17 @@
{
"schema_version": "1.4.0",
"id": "GHSA-54mj-vcvj-q3v5",
"modified": "2026-01-03T00:24:47Z",
"modified": "2026-01-03T00:24:48Z",
"published": "2025-12-22T21:30:33Z",
"aliases": [
"CVE-2025-67288"
],
"summary": "Umbraco CMS has an arbitrary file upload vulnerability",
"details": "An arbitrary file upload vulnerability in Umbraco CMS v16.3.3 allows attackers to execute arbitrary code via uploading a crafted PDF file.",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:P"
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N"
Copy link

Copilot AI Jan 9, 2026

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

The CVSS v4 score has been downgraded to all "N" (None) values for impact metrics (VC, VI, VA, SC, SI, SA), which results in a score of 0.0. A CVSS score of 0.0 typically indicates no vulnerability exists. However, the advisory still describes an "arbitrary file upload vulnerability" that "allows attackers to execute arbitrary code." This is inconsistent - if the vulnerability allows arbitrary code execution as stated, the impact metrics should reflect this. If the vulnerability has been determined to be invalid or a duplicate (as mentioned in the PR description), the advisory should likely be withdrawn rather than kept with a contradictory zero-impact score.

Suggested change
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N"
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"

Copilot uses AI. Check for mistakes.
}
],
"affected": [
Expand Down Expand Up @@ -62,7 +58,7 @@
"CWE-434",
"CWE-79"
],
"severity": "MODERATE",
"severity": "LOW",
Copy link

Copilot AI Jan 9, 2026

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

The severity has been downgraded from "MODERATE" to "LOW", but this conflicts with the CVSS v4 score which now calculates to 0.0 (all impact metrics set to None). A CVSS score of 0.0 would typically correspond to "NONE" severity, not "LOW". Either the CVSS metrics should be adjusted to reflect a low-severity issue, or the severity should be changed to "NONE" or the advisory should be withdrawn if it's been determined to be invalid or duplicate.

Suggested change
"severity": "LOW",
"severity": "NONE",

Copilot uses AI. Check for mistakes.
"github_reviewed": true,
"github_reviewed_at": "2025-12-22T22:47:47Z",
"nvd_published_at": "2025-12-22T19:15:49Z"
Expand Down
Loading