CVE-2026-27178: MajorDoMo (aka Major Domestic Module) contains a stored cross-site scripting (XSS) vulnerability through metho

This week

HIGH 7.2REMOTEMITIGATE

CVE-2026-27178 is a high-severity flaw (CVSS 7.2) affecting majordomo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

MajorDoMo (aka Major Domestic Module) contains a stored cross-site scripting (XSS) vulnerability through method parameter injection into the shoutbox. The /objects/?method= endpoint allows unauthenticated execution of stored methods with attacker-controlled parameters. Default methods such as ThisComputer.VolumeLevelChanged pass the user-supplied VALUE parameter directly into the say() function, which stores the message raw in the shouts database

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 82%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-02-18
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: mjdm

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-18 22:16 UTCPublished CVE record published
2026-06-17 10:26 UTCUpdated Record last modified

mjdm majordomo MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy majordomo || rpm -q majordomo || majordomo --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-27178?

majordomo: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-27178 being exploited?

CVE-2026-27178 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-27178 affect?

CVE-2026-27178 affects majordomo. Severity is high (CVSS 7.2). MajorDoMo (aka Major Domestic Module) contains a stored cross-site scripting (XSS) vulnerability through method parameter injection into the shoutbox. The /objects/?method= endpoint allows unauthenticated execution of stored methods with at

How urgent is CVE-2026-27178?

Priority 40/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-27181 HIGH 7.5 MITIGATE MajorDoMo (aka Major Domestic Module) allows unauthenticated arbitrary module uninstallation through the marke
CVE-2026-27180 CRITICAL 9.8 MITIGATE MajorDoMo (aka Major Domestic Module) is vulnerable to unauthenticated remote code execution through supply ch
CVE-2026-27179 HIGH 8.2 MITIGATE MajorDoMo (aka Major Domestic Module) contains an unauthenticated SQL injection vulnerability in the commands
CVE-2026-27177 HIGH 7.2 MITIGATE MajorDoMo (aka Major Domestic Module) contains a stored cross-site scripting (XSS) vulnerability via the /obje
CVE-2026-27176 MEDIUM 6.1 MITIGATE MajorDoMo (aka Major Domestic Module) contains a reflected cross-site scripting (XSS) vulnerability in command

References

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