NVD / CVE Program· CNA GitHub_M

CVE-2026-33159: Craft CMS: Unauthenticated users could execute project configuration sync operations that should be restricted trusted users

Noroxi assessment

Priority: Monitor (action score 27/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.31% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
Fixed version: craftcms/cms (Packagist) 4.17.8, 5.9.14.

Low priority for now. Upgrade to craftcms/cms (Packagist) 4.17.8, 5.9.14 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Craft CMS is a content management system (CMS). From version 4.0.0-RC1 to before version 4.17.8 and from version 5.0.0-RC1 to before version 5.9.14, guest users can access Config Sync updater index, obtain signed data, and execute state-changing Config Sync actions (regenerate-yaml, apply-yaml-changes) without authentication. This issue has been patched in versions 4.17.8 and 5.9.14.

MediumCVSS 6.9 · v4.0—No exploit Fix available

GHSA-6mrr-q3pj-h53w

Published: Mar 24, 2026
Updated: Jun 17, 2026
EPSS: 0.3% · 24th percentile
CWE: CWE-306

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 27 / 40 · 6.9 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.3%

CISA SSVC decision

Exploitation: proof of concept
Automatable: yes
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · GitHub_M: 6.9; NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
craftcms	craft cms	cpe:2.3:a:craftcms:craft_cms

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

craftcms craft cmsafter 4.0.0 · before 4.17.8
craftcms craft cmsafter 5.0.0 · before 5.9.14
craftcms craft cms4.0.0
craftcms craft cms5.0.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

craftcms cms
- >= 4.0.0-RC1, < 4.17.8, >= 5.0.0-RC1, < 5.9.14affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Packagist	craftcms/cms	from 4.0.0-RC1 · before 4.17.8	4.17.8
Packagist	craftcms/cms	from 5.0.0-RC1 · before 5.9.14	5.9.14

Same product

craftcms: all records

Other highest-scoring records for the same primary product.

CVE-2025-32432Craft CMS Allows Remote Code ExecutionKEV
100Now
CVE-2024-56145RCE when PHP `register_argc_argv` config setting is enabled in craftcms/cmsKEV
96Now
CVE-2025-23209Potential RCE with a compromised security key in craft/cmsKEV
68This week

Published before and after this one in the same product

← EarlierCVE-2026-33157Mar 24, 2026 · Craft CMS: Potential authenticated Remote Code Execution via malicious attached Behavior
34Monitor
← EarlierCVE-2026-33158Mar 24, 2026 · Craft CMS: Low-privilege users could read private asset contents when editing an asset (IDOR)
19Monitor
Later →CVE-2026-33160Mar 24, 2026 · Craft CMS: Anonymous "generate transform" calls for assets can expose private assets via transform URL
10Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Packagist:craftcms/cms	4.17.8	Package registry (OSV)
Packagist:craftcms/cms	5.9.14	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

craftcms/cmscommit 7f0ead8

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

—

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

CVE-2026-331570 days apartCraft CMS: Potential authenticated Remote Code Execution via malicious attached Behavior
34Monitor
CVE-2026-322638 days apartCraft CMS vulnerable to behavior injection RCE via EntryTypesController
34Monitor
CVE-2026-322648 days apartCraft CMS vulnerable to behavior injection RCE ElementIndexesController and FieldsController
34Monitor
CVE-2026-322628 days apartCraft CMS has a Path Traversal Vulnerability in AssetsController
21Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: X

Weakness class (CWE)

CWE-306 · Missing Authentication for Critical Function

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Root cause

A function added for development or support ships to production without authentication. It often relies on the assumption that it is “only reachable from the internal network.”

The bug in code

The whole CWE-306 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1// Added for the support team
2app.post("/maintenance/reset", resetDevice);

Fixed

1if (config.maintenanceEnabled) {
2  app.post(
3    "/maintenance/reset",
4    requireSession, requireRole("admin"), resetDevice
5  );
6}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

Fix✗ → ✓Sep 28, 2026, 10:45 PM UTC

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References

github.com/craftcms/cms/commit/7f0ead833f7c2b91ae12003caad833479dd08592

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records