CVE-2023-38327: An issue was discovered in eGroupWare 17.1.20190111

Routine

MEDIUM 5.3REMOTEDOWNGRADE

CVE-2023-38327 is a medium-severity flaw (CVSS 5.3) 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 User Enumeration vulnerability exists under calendar/freebusy.php, which allows unauthenticated remote attackers to enumerate the users of web applications based on server response.

Why this priority

Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 71%)
CISA exploited list	No
Weakness	CWE-203
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-2023-38327?

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

Is CVE-2023-38327 being exploited?

CVE-2023-38327 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-2023-38327 affect?

CVE-2023-38327 affects egroupware. Severity is medium (CVSS 5.3). An issue was discovered in eGroupWare 17.1.20190111. A User Enumeration vulnerability exists under calendar/freebusy.php, which allows unauthenticated remote attackers to enumerate the users of web applications based on server response.

How urgent is CVE-2023-38327?

Priority 31/100. Remotely exploitable, no login, no user action

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-2023-38329 MEDIUM 6.1 DOWNGRADE An issue was discovered in eGroupWare 17.1.20190111

References

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