CVE-2025-54287Public exploitNetwork attack vector

Host file read via snapshot template injection

Published Oct 2, 2025 · Updated Oct 2, 2025

Template injection in Canonical LXD 5.21 and later before 5.21.4 and 6.0 and later before 6.5 allows remote authenticated users to read host files. The RenderTemplate function parses snapshots.pattern with an unrestricted Pongo2 template set, so include loads host paths while urlencode and slice expose their content through a generated snapshot name. Exploitation requires permission to modify instance settings; the demonstrated effect is host-file disclosure without code execution, data modification, or service interruption.

CVSS severity7.1
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Template injection in Canonical LXD 5.21 and later before 5.21.4 and 6.0 and later before 6.5 allows remote authenticated users to read host files. The RenderTemplate function parses snapshots.pattern with an unrestricted Pongo2 template set, so include loads host paths while urlencode and slice expose their content through a generated snapshot name. Exploitation requires permission to modify instance settings; the demonstrated effect is host-file disclosure without code execution, data modification, or service interruption.

The record

CVE
CVE-2025-54287
Published
Oct 2, 2025
Updated
Oct 2, 2025
Vendor
Canonical
Product
LXD
Classifications
CWE-1336, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 2, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 2, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.21 <5.21.4
  2. Affected versionversion=6.0 <6.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Canonical · LXDversion=5.21 <5.21.4; version=6.0 <6.5

Published CVSS scores

7.1Canonical Ltd.CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1336Improper Neutralization of Special Elements Used in a Template Engine
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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