Admidio Vulnerable to HTML Injection In The Messages Section

Exploitation

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

CVSS

3.5 · CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

EPSS

• CVE-2024-47836: 0.51% estimated exploitation activity in the next 30 days; percentile 43.61 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary An unsafe deserialization vulnerability allows any unauthenticated user to execute arbitrary code on the server. PoC 1. Go to https://www.admidio.org/demoen/admprogram/modules/messages/messages.php 2. Click on Send Private Message 3. In the Message field, enter the following payload Testing<br<h1HTML</h1<br<h2Injection</h2 4. Send the message 5. Open the message again Impact 1. Data Theft: Stealing sensitive information like cookies, session tokens, and user credentials. 2. Session Hijacking: Gaining unauthorized access to user accounts. 3. Phishing: Tricking users into revealing sensitive information. 4. Website Defacement: Altering the appearance or content of the website. 5. Malware Distribution: Spreading malware to users' devices. 6. Denial of Service (DoS): Overloading the server with malicious requests.

Published by the source

16 Oct 2024, 19:50 UTC

Last modified by the source

16 Oct 2024, 22:07 UTC

Source last checked

26 Oct 2026, 14:26 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-7c4c-749j-pfp2

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# Patch Next advisory brief: CVE-2024-47836

Advisory: Admidio Vulnerable to HTML Injection In The Messages Section
IDs: CVE-2024-47836, GHSA-7c4c-749j-pfp2
Record: https://patchnext.com/advisories/cve-2024-47836 (revision 1, source checked 26 Oct 2026, 14:26 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Low (CVSS 3.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: admidio/admidio 4.3.12. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist admidio/admidio: affected < 4.3.12; fixed in 4.3.12

## Suggested inspection (read-only)
- Packagist admidio/admidio: 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 admidio/admidio.
- 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-7c4c-749j-pfp2 (GitHub-reviewed advisory GHSA-7c4c-749j-pfp2 lists affected ranges: Packagist admidio/admidio >=0 <4.3.12)

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