EGroupware Vulnerable to Local File Inclusion via file:// URI in Mail Compose

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

6.5 · CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

No dated EPSS signal available.

As published by the source; long descriptions are shortened.

Summary The function processes image URLs embedded in an HTML email body without validating or restricting URI schemes. The check !strstartswith($myUrl, 'http') evaluates to true for file:// URIs, causing filegetcontents($basedir . urldecode($myUrl)) to read arbitrary files from the server filesystem and embed them as inline MIME attachments in outgoing email. strstartswith('file:///etc/passwd', 'http') → false !false → true PoC 1. Log in as any authenticated EGroupware user with mail access and open the mail compose window. 2. Switch to HTML body mode and insert: <img src="file:///etc/passwd". 3. The server executes filegetcontents('file:///etc/passwd'), writes the content to a temp file, and attaches it as an inline MIME part. Impact An authenticated attacker can read arbitrary files accessible by the web server process, including /etc/passwd, application configuration files containing database credentials, private TLS keys, and environment files. Remediation Enforce a strict URI…

Published by the source

7 Jul 2026, 13:02 UTC

Last modified by the source

7 Jul 2026, 13:02 UTC

Source last checked

26 Oct 2026, 14:50 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-c8m7-r2jv-rw63

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# Patch Next advisory brief: CVE-2026-45016

Advisory: EGroupware Vulnerable to Local File Inclusion via file:// URI in Mail Compose
IDs: CVE-2026-45016, GHSA-c8m7-r2jv-rw63
Record: https://patchnext.com/advisories/cve-2026-45016 (revision 1, source checked 26 Oct 2026, 14:50 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: egroupware/egroupware 26.5.20260507, 23.1.20260601. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist egroupware/egroupware: affected >= 26.0.20251208, < 26.5.20260507; < 23.1.20260601; fixed in 26.5.20260507, 23.1.20260601

## Suggested inspection (read-only)
- Packagist egroupware/egroupware: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on egroupware/egroupware.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-c8m7-r2jv-rw63 (GitHub-reviewed advisory GHSA-c8m7-r2jv-rw63 lists affected ranges: Packagist egroupware/egroupware >=26.0.20251208 =0 <23.1.20260601)

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