CVE-2026-25154Public exploitNetwork attack vector

Browser script execution via unescaped shared filename

Published Jan 30, 2026 · Updated Jan 30, 2026

Stored XSS in LocalSend 1.17.0 and earlier allows remote attackers to execute script in a victim's browser through a crafted filename. handleFilesDisplay in app/assets/web/main.js concatenates file.fileName into an HTML string and assigns it to the file-list element's innerHTML without escaping. Exploitation requires a victim to open an attacker-hosted Share via Link page on the same network, or to reshare an attacker-supplied file; script runs in that page's origin and can read or alter accessible content.

CVSS severity6.1
Medium
EPSS probability0.29%
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 LocalSend 1.17.0 and earlier allows remote attackers to execute script in a victim's browser through a crafted filename. handleFilesDisplay in app/assets/web/main.js concatenates file.fileName into an HTML string and assigns it to the file-list element's innerHTML without escaping. Exploitation requires a victim to open an attacker-hosted Share via Link page on the same network, or to reshare an attacker-supplied file; script runs in that page's origin and can read or alter accessible content.

The record

CVE
CVE-2026-25154
Published
Jan 30, 2026
Updated
Jan 30, 2026
Vendor
LocalSend
Product
LocalSend
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 30, 2026Record 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=<= 1.17.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LocalSend · LocalSendversion=<= 1.17.0

Published CVSS scores

6.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

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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