NVD / CVE Program· CNA GitHub_M

CVE-2025-30207: Kirby vulnerable to path traversal in the router for PHP's built-in server

Noroxi assessment

Priority: Monitor (action score 9/100)

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: 0.58% (FIRST EPSS).
Someone on the same network segment can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
Fixed version: getkirby/cms (Packagist) 3.10.1.2, 4.7.1, 3.9.8.3.

Low priority for now. Upgrade to getkirby/cms (Packagist) 3.10.1.2, 4.7.1, 3.9.8.3 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

Kirby is an open-source content management system. A vulnerability in versions prior to 3.9.8.3, 3.10.1.2, and 4.7.1 affects all Kirby setups that use PHP's built-in server. Such setups are commonly only used during local development. Sites that use other server software (such as Apache, nginx or Caddy) are not affected. A missing path traversal check allowed attackers to navigate all files on the server that were accessible to the PHP process, including files outside of the Kirby installation. The vulnerable implementation delegated all existing files to PHP, including existing files outside of the document root. This leads to a different response that allows attackers to determine whether the requested file exists. Because Kirby's router only delegates such requests to PHP and does not load or execute them, contents of the files were not exposed as PHP treats requests to files outside of the document root as invalid. The problem has been patched in Kirby 3.9.8.3, Kirby 3.10.1.2, and Kirby 4.7.1. In all of the mentioned releases, the maintainers of Kirby have updated the router to check if existing static files are within the document root. Requests to files outside the document root are treated as page requests of the error page and will no longer allow to determine whether the file exists or not.

LowCVSS 2.3 · v4.0—No exploit Fix available

GHSA-9p3p-w5jf-8xxg

Published: May 13, 2025
Updated: Jun 17, 2026
EPSS: 0.5% · 48th percentile
CWE: CWE-22

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 9 / 40 · 2.3 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.5%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · GitHub_M: 2.3; NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/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

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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
getkirby	kirby	cpe:2.3:a:getkirby:kirby

Affected versions

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

getkirby kirbybefore 3.9.8.3
getkirby kirby3.10.0 and later · before 3.10.1.2
getkirby kirby4.0.0 and later · before 4.7.1

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.

getkirby kirby
- < 3.9.8.3, >= 3.10.0, < 3.10.1.2, >= 4.0.0, < 4.7.1affected

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Packagist	getkirby/cms	from 3.10.0 · before 3.10.1.2	3.10.1.2
Packagist	getkirby/cms	from 4.0.0 · before 4.7.1	4.7.1
Packagist	getkirby/cms	before 3.9.8.3	3.9.8.3

Same product

getkirby: all records

Other highest-scoring records for the same primary product.

CVE-2023-38490Kirby XML External Entity (XXE) vulnerability in the XML data handler
41Plan
CVE-2026-44177Kirby: Pre-authentication path traversal and PHP file inclusion during user lookup
36Monitor
CVE-2026-54003Kirby: External Initialization of the Panel on reverse proxy setups with the `Forwarded` header
36Monitor

Published before and after this one in the same product

← EarlierCVE-2024-41964Aug 29, 2024 · Insufficient permission checks in the language settings in Kirby CMS
32Monitor
← EarlierCVE-2025-30159May 13, 2025 · Kirby vulnerable to path traversal of snippet names in the `snippet()` helper
25Monitor
Later →CVE-2025-31493May 13, 2025 · Path traversal of collection names during file system lookup
25Monitor

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:getkirby/cms	3.10.1.2	Package registry (OSV)
Packagist:getkirby/cms	3.9.8.3	Package registry (OSV)
Packagist:getkirby/cms	4.7.1	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.

No commit or PR link among the references.

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.

CVE-2026-44177429 days apartKirby: Pre-authentication path traversal and PHP file inclusion during user lookup
36Monitor
CVE-2026-75594475 days apartKirby: Access to image files and limited access to JSON files outside of the site root via path traversal in the media handling
32Monitor
CVE-2026-75592475 days apartKirby: Access to image files outside of the site root via path traversal in the media handling
27Monitor
CVE-2025-301590 days apartKirby vulnerable to path traversal of snippet names in the `snippet()` helper
25Monitor
CVE-2025-314930 days apartPath traversal of collection names during file system lookup
25Monitor

Chain candidates

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

—

Bug bounty scope

No known public program.

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

Technical details

Attack conditions

Someone on the same network segment 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: Adjacent
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: X

Weakness class (CWE)

CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSS vector

CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/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 user-supplied file name is joined with the allowed directory, but the result is never checked to confirm it is still inside that directory.

The bug in code

The whole CWE-22 class

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

Vulnerable

1const file = path.join(ROOT, req.query.name);
2res.sendFile(file);

Fixed

1const file = path.resolve(ROOT, req.query.name);
2if (!file.startsWith(ROOT + path.sep)) {
3  return res.sendStatus(400);
4}
5res.sendFile(file);

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, 10:46 PM UTC

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References

github.com/getkirby/kirby/releases/tag/3.10.1.2

Show all references (3 more)

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

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