CVE-2025-64759Network attack vector

Stored XSS via unsanitized uploaded SVG rendering

Published Nov 19, 2025 · Updated Nov 19, 2025

Stored XSS in Homarr before 1.43.3 allows remote authenticated users to execute JavaScript in another user's browser via an uploaded SVG. The /api/user-medias/ endpoint returned attacker-controlled SVG content without sanitizing scripts or inline event handlers, while iframe items lacked sandboxing. An attacker must be able to upload media and edit a board; execution in an administrator's session can add the attacker's account to credentials-admin.

CVSS severity8.1
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Homarr before 1.43.3 allows remote authenticated users to execute JavaScript in another user's browser via an uploaded SVG. The /api/user-medias/ endpoint returned attacker-controlled SVG content without sanitizing scripts or inline event handlers, while iframe items lacked sandboxing. An attacker must be able to upload media and edit a board; execution in an administrator's session can add the attacker's account to credentials-admin.

The record

CVE
CVE-2025-64759
Published
Nov 19, 2025
Updated
Nov 19, 2025
Vendor
Homarr
Product
Homarr
Classifications
CWE-20, CWE-434, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 19, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 19, 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=< 1.43.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Homarr · Homarrversion=< 1.43.3

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N
8.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-434Unrestricted Upload of File with Dangerous Type
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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