CVE-2026-23887: Group-Office is an enterprise customer relationship management and groupware tool

Routine

MEDIUM 5.4UPGRADE

CVE-2026-23887 is a medium-severity flaw (CVSS 5.4) affecting group office. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Group-Office is an enterprise customer relationship management and groupware tool. In versions 6.8.148 and below, and 25.0.1 through 25.0.79, the application stores unsanitized filenames in the database, which can lead to Stored Cross-Site Scripting (XSS). Users who interact with these specially crafted file names within the Group-Office application are affected. While the scope is limited to the file-viewing context, it could still be used to in

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-20, CWE-79
Published	2026-01-22
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: group-office

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

Am I affected?

Timeline

2026-01-22 00:15 UTCPublished CVE record published
2026-06-17 10:22 UTCUpdated Record last modified

group-office group office UPGRADE

Affected: < 6.8.149 · >= 25.0.1 and < 25.0.80

Fixed in: 6.8.149, 25.0.80

Safe to downgrade to: a release before 25.0.1

1. Check installed version

apt-cache policy group-office || rpm -q group-office || group-office --version

2. UPGRADE to 6.8.149 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade group-office

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade group-office

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 25.0.1 (Debian / Ubuntu)

apt-cache madison group-office sudo apt install group-office=<VERSION_BEFORE_25.0.1> sudo apt-mark hold group-office

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list group-office sudo dnf downgrade group-office-<VERSION_BEFORE_25.0.1> sudo dnf versionlock add group-office

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-23887?

group office: upgrade to 6.8.149, 25.0.80. Exact commands for each OS are on this page.

Is CVE-2026-23887 being exploited?

CVE-2026-23887 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-2026-23887 affect?

CVE-2026-23887 affects group office. Severity is medium (CVSS 5.4). Group-Office is an enterprise customer relationship management and groupware tool. In versions 6.8.148 and below, and 25.0.1 through 25.0.79, the application stores unsanitized filenames in the database, which can lead to Stored Cross-Site

How urgent is CVE-2026-23887?

Priority 29/100. Public exploit reference

Related CVEs

CVE-2026-25512 HIGH 8.8 UPGRADE Group-Office is an enterprise customer relationship management and groupware tool
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CVE-2026-25134 HIGH 8.8 UPGRADE Group-Office is an enterprise customer relationship management and groupware tool
CVE-2025-63406 HIGH 8.8 UPGRADE An issue in Intermesh BV GroupOffice vulnerable before v.25.0.47 and 6.8.136 allows a remote attacker to execu
CVE-2025-53505 MEDIUM 5.3 UPGRADE Group-Office versions prior to 6.8.119 and prior to 25.0.20 provided by Intermesh BV contain a path traversal

References

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