CVE-2023-38329: An issue was discovered in eGroupWare 17.1.20190111

Routine

MEDIUM 6.1DOWNGRADE

CVE-2023-38329 is a medium-severity flaw (CVSS 6.1) affecting egroupware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in eGroupWare 17.1.20190111. A cross-site scripting Reflected (XSS) vulnerability exists in calendar/freebusy.php, which allows unauthenticated remote attackers to inject arbitrary web script or HTML into the "user" HTTP/GET parameter, which reflects its input without sanitization.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 80%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-07-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: egroupware

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

Am I affected?

Timeline

2025-07-11 15:15 UTCPublished CVE record published
2026-06-17 06:09 UTCUpdated Record last modified

egroupware egroupware DOWNGRADE

Affected: 17.1.20190111

Fixed in: no fixed release known

Safe to downgrade to: a release before 17.1.20190111

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 17.1.20190111 (Debian / Ubuntu)

apt-cache madison egroupware sudo apt install egroupware=<VERSION_BEFORE_17.1.20190111> sudo apt-mark hold egroupware

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list egroupware sudo dnf downgrade egroupware-<VERSION_BEFORE_17.1.20190111> sudo dnf versionlock add egroupware

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-2023-38329?

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

Is CVE-2023-38329 being exploited?

CVE-2023-38329 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-2023-38329 affect?

CVE-2023-38329 affects egroupware. Severity is medium (CVSS 6.1). An issue was discovered in eGroupWare 17.1.20190111. A cross-site scripting Reflected (XSS) vulnerability exists in calendar/freebusy.php, which allows unauthenticated remote attackers to inject arbitrary web script or HTML into the "user"

How urgent is CVE-2023-38329?

Priority 26/100. No elevated risk signals yet.

Software pages

PHP vulnerabilities

Related CVEs

CVE-2026-22243 HIGH 8.8 UPGRADE EGroupware is a Web based groupware server written in PHP
CVE-2024-40614 CRITICAL 9.8 UPGRADE EGroupware before 23.1.20240624 mishandles an ORDER BY clause
CVE-2023-38327 MEDIUM 5.3 DOWNGRADE An issue was discovered in eGroupWare 17.1.20190111

References

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