CVE-2026-27176Public exploitNetwork attack vector

Browser script execution via unescaped query reflection

Published Feb 18, 2026 · Updated Feb 18, 2026

Reflected XSS in command.php in SJLab MajorDoMo allows remote attackers to execute browser script through a crafted qry parameter. The page inserts $qry without HTML escaping into both an input value attribute and a paragraph, allowing markup to break out and run JavaScript. Exploitation requires a victim to follow the crafted URL; the script runs in that victim's MajorDoMo origin and can read or alter page-accessible data.

CVSS severity5.1
Medium
EPSS probability0.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in command.php in SJLab MajorDoMo allows remote attackers to execute browser script through a crafted qry parameter. The page inserts $qry without HTML escaping into both an input value attribute and a paragraph, allowing markup to break out and run JavaScript. Exploitation requires a victim to follow the crafted URL; the script runs in that victim's MajorDoMo origin and can read or alter page-accessible data.

The record

CVE
CVE-2026-27176
Published
Feb 18, 2026
Updated
Feb 18, 2026
Vendor
MajorDoMo
Product
MajorDoMo
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 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=0 <=*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MajorDoMo · MajorDoMoversion=0 <=*

Published CVSS scores

6.1VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA: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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