NVD / CVE Program· CNA canonical

CVE-2025-54292: Client-Side Path Traversal in LXD-UI

Noroxi assessment

Priority: Monitor (action score 19/100)

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: 0.32% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No special conditions are required; it is repeatable.
Fixed version: Canonical LXD 5.21.4, 6.5.

Low priority for now. Upgrade to Canonical LXD 5.21.4, 6.5 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

Path traversal in Canonical LXD LXD-UI versions before 6.5 and 5.21.4 on all platforms allows remote authenticated attackers to access or modify unintended resources via crafted resource names embedded in URL paths.

MediumCVSS 4.8 · v4.0—No exploit Fix available

Path traversal

Published: Oct 2, 2025
Updated: Oct 12, 2026
EPSS: 0.3% · 25th percentile
CWE: CWE-22

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 19 / 40 · 4.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.3%

CISA SSVC decision

Exploitation: proof of concept
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · canonical: 4.8; NVD has not scored this yet; the score shown is the CNA’s.

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

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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
canonical	lxd	cpe:2.3:a:canonical:lxd

Affected versions

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

canonical lxd5.0.0 and later · before 5.21.4
canonical lxd6.0 and later · before 6.5

Versions reported by the vendor

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

Canonical LXD
- 6.0 and later · before 6.5affected · semver
- 5.21 and later · before 5.21.4affected · semver

Same product

canonical: all records

Other highest-scoring records for the same primary product.

CVE-2026-87799Arbitrary file write on LXD host via symlink in migration stream
39Monitor
CVE-2026-85526Path traversal via Btrfs optimized-backup subvolumes[].path enables root file/dir manipulation in LXD
39Monitor
CVE-2026-66897Instance template path traversal allows arbitrary host file write as root
39Monitor

Published before and after this one in the same product

← EarlierCVE-2025-54290Oct 2, 2025 · Project Existence Disclosure via Error Handling in LXD Image Export
27Monitor
← EarlierCVE-2025-54291Oct 2, 2025 · Project existence disclosure in LXD images API
27Monitor
Later →CVE-2025-54293Oct 2, 2025 · Path Traversal in LXD Instance Log File Retrieval
28Monitor

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
Canonical LXD	5.21.4	Vendor (CNA)
Canonical LXD	6.5	Vendor (CNA)

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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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.

GMO Flatt Security Inc.

Variant candidates

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

CVE-2026-66898314 days apartPath traversal via unvalidated instance name in backup tarball restore enables root file write / RCE
39Monitor
CVE-2026-66897326 days apartInstance template path traversal allows arbitrary host file write as root
39Monitor
CVE-2026-85526361 days apartPath traversal via Btrfs optimized-backup subvolumes[].path enables root file/dir manipulation in LXD
39Monitor
CVE-2026-85185361 days apartPath traversal in LXD btrfs storage driver allows arbitrary file deletion and write on host as root
38Monitor
CVE-2026-16033314 days apartArbitrary file read+write on host via templates/ symlink in malicious image
34Monitor
CVE-2025-542930 days apartPath Traversal in LXD Instance Log File Retrieval
28Monitor

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-2025-542900 days apartProject Existence Disclosure via Error Handling in LXD Image Export
27Monitor
CVE-2025-542880 days apartSource Container Identification Vulnerability via cmdline Spoofing in devLXD Server
20Monitor

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.
A low-privileged account is enough.
No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability

Attack vector: Network
Attack complexity: Low
Privileges required: Low
User interaction: A
Scope: X

Weakness class (CWE)

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

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/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 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, 10:08 PM UTC

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