CVE-2025-53504: Group-Office versions prior to 6.8.119 and prior to 25.0.20 provided by Intermesh BV contain a cross-site scri

Routine

MEDIUM 5.4UPGRADE

CVE-2025-53504 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 versions prior to 6.8.119 and prior to 25.0.20 provided by Intermesh BV contain a cross-site scripting vulnerability. If this vulnerability is exploited, an arbitrary script may be executed in the user's web browser.

Why this priority

No elevated risk signals yet

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	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-08-21
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · 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

2025-08-21 05:15 UTCPublished CVE record published
2026-06-17 09:38 UTCUpdated Record last modified

group-office group office UPGRADE

Affected: < 6.8.119 · >= 25.0.1 and < 25.0.20

Fixed in: 6.8.119, 25.0.20

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 6.8.119 (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-2025-53504?

group office: upgrade to 6.8.119, 25.0.20. Exact commands for each OS are on this page.

Is CVE-2025-53504 being exploited?

CVE-2025-53504 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-2025-53504 affect?

CVE-2025-53504 affects group office. Severity is medium (CVSS 5.4). Group-Office versions prior to 6.8.119 and prior to 25.0.20 provided by Intermesh BV contain a cross-site scripting vulnerability. If this vulnerability is exploited, an arbitrary script may be executed in the user's web browser.

How urgent is CVE-2025-53504?

Priority 21/100. No elevated risk signals yet.

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References

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