CVE-2026-22881Network attack vector

Password resets via Message cross-site scripting

Published Feb 2, 2026 · Updated Feb 2, 2026

Cross-site scripting in Cybozu Garoon Message 5.15.0 through 6.0.3 allows remote authenticated users to reset arbitrary users' passwords. Cybozu states that arbitrary script executes in a user's browser but withholds reproduction steps and the specific input or output path that fails to neutralize Message content. Exploitation requires low-privileged access and active interaction by a user; the documented consequence is unauthorized password reset.

CVSS severity5.7
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Cross-site scripting in Cybozu Garoon Message 5.15.0 through 6.0.3 allows remote authenticated users to reset arbitrary users' passwords. Cybozu states that arbitrary script executes in a user's browser but withholds reproduction steps and the specific input or output path that fails to neutralize Message content. Exploitation requires low-privileged access and active interaction by a user; the documented consequence is unauthorized password reset.

The record

CVE
CVE-2026-22881
Published
Feb 2, 2026
Updated
Feb 2, 2026
Vendor
Cybozu
Product
Garoon
Classifications
CWE-79
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=5.15.0 to 6.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Cybozu · Garoonversion=5.15.0 to 6.0.3

Published CVSS scores

6.8JPCERT/CCCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.7JPCERT/CCCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo