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CVE-2026-1469 is a Stored Cross-Site Scripting (XSS) vulnerability found in RLE NOVA’s PlanManager application . The vulnerability allows an attacker to inject malicious JavaScript code through the ‘comment’ and ‘brand’ parameters in the ‘/index.php’ script . Because the application fails to properly sanitize this input, the malicious payload is stored on the server . When other users, such as administrators or regular employees, access the page where this payload is displayed, the JavaScript code executes automatically in their browsers . This execution can lead to the theft of sensitive session cookies, allowing the attacker to hijack user sessions and perform unauthorized actions on behalf of the victim . The vulnerability has a CVSS v4.0 base score of 6.9, classifying it as a medium-severity issue . It affects all versions of the PlanManager software that were hosted on the now-defunct planmanager.es domain .
Platform: RLE NOVA PlanManager
Version: all versions
Vulnerability: Stored XSS
Severity: Medium
date: 2026-01-29
Prediction: No patch expected
What Undercode Say:
Analytics:
The vulnerability is identified by CWE-79 . The CVSS v4.0 vector is AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N . This indicates a network-based, low-complexity attack requiring low privileges but user interaction, with a high impact on confidentiality . The EPSS score is 0.00047, indicating a very low probability of exploitation in the wild . The vulnerability was discovered by a researcher named Fenix08 .
Example of using curl to test for the vulnerability by injecting a test payload
This command attempts to inject a basic JavaScript alert into the 'comment' parameter.
Note: This is for educational purposes only on systems you are authorized to test.
curl -X POST http://target-planmanager.es/index.php \
-d "comment=<script>alert('XSS-Test')</script>" \
-d "brand=TestBrand"
Example of using grep to search for potential attack patterns in access logs This searches for the 'comment' parameter containing common XSS script tags. sudo grep -E "comment=.<script>" /var/log/apache2/access.log
Exploit:
An attacker can craft a malicious POST request to `/index.php` . A simple proof-of-concept payload for the `comment` parameter could be: `` . When stored and viewed by another user, this script sends the victim’s session cookies to the attacker’s server . No public exploit code is known to be circulating, but the vulnerability is considered exploitable due to its nature .
Protection from this CVE:
The primary solution is that the vulnerability is no longer exploitable as the affected service, planmanager.es, was taken offline in October 2025 . For any self-hosted instances, protection requires implementing strict input validation and output encoding for the ‘comment’ and ‘brand’ parameters . A strong Content Security Policy (CSP) can also mitigate the impact of a successful XSS attack .
Example of a CSP header to mitigate XSS impact This header, when set by the server, instructs the browser to only execute scripts from the same origin. Header always set Content-Security-Policy "script-src 'self';"
// Example of PHP output encoding to prevent XSS // Before displaying the user-supplied 'comment' data, use htmlspecialchars to escape it. echo "User Comment: " . htmlspecialchars($userComment, ENT_QUOTES, 'UTF-8');
Impact:
Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of a victim’s browser . This can lead to the theft of session cookies, enabling session hijacking and account takeover . An attacker could also perform unauthorized actions on behalf of the victim, deface the web page, or redirect users to malicious sites . For organizations, this could result in data breaches, reputational damage, and regulatory non-compliance .
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Sources:
Reported By: nvd.nist.gov
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