vulnerability / NVI-00005155 / Revision 1
REDAXO: Stored XSS in Mediapool Sync Page via Unescaped Filesystem Filenames
OSV carries this publisher advisory for redaxo/source. This is an aggregated source copy; consult the original publisher and compare update dates.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
redaxo/source
source listedECOSYSTEM: introduced 0; fixed 5.21.2
### Summary The mediapool sync page (`sync.php`) renders filenames from the `/media` filesystem directory directly into HTML without applying `rex_escape()` (i.e., `htmlspecialchars`). Any file placed in the media directory whose filename contains HTML metacharacters will execute JavaScript in the browser of any backend user who views the sync page. ### Details In `redaxo/src/addons/mediapool/pages/sync.php`, the variable `$diffFiles` is populated from actual filesystem filenames (files in `/media/` not yet registered in the database). These filenames are then rendered without escaping: **File:** `redaxo/src/addons/mediapool/pages/sync.php:119-120` ```php foreach ($diffFiles as $file) { if (is_writable(rex_path::media($file))) { $e = []; $e['label'] = '' . $file . ''; // NO rex_escape! $e['field'] = ''; // NO rex_escape! $writable[] = $e; } else { $notWritable[] = $file; } } ``` **File:** `redaxo/src/addons/mediapool/pages/sync.php:170` ```php $fragment->setVar('body', '' . implode('', $notWritable) . '', false)
03 / Response
What to do next
- vendor patch
The original advisory lists fixed boundaries 5.21.2 for redaxo/source. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-w998-qmw9-mf4m ↗
GitHub Advisory Database via OSV · vendor advisory
Observed . GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.