CVE-2025-8769
Published: 24 December 2025
Description
Telenium Online Web Application is vulnerable due to a Perl script that is called to load the login page. Due to improper input validation, an attacker can inject arbitrary Perl code through a crafted HTTP request, leading to remote code…
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execution on the server.
Mitigating Controls (NIST 800-53 r5)AI
Directly mandates validation of HTTP request inputs to the Perl login script, preventing arbitrary Perl code injection due to improper input validation.
Requires timely identification, reporting, and correction of the specific flaw in the Perl script's input handling to eliminate the RCE vulnerability.
Enables vulnerability scanning to detect the improper input validation issue in the login page Perl script, facilitating prompt remediation.
Security SummaryAI
CVE-2025-8769 is a critical vulnerability in the Telenium Online Web Application, affecting a Perl script called to load the login page. Due to improper input validation (CWE-20), attackers can inject arbitrary Perl code through a crafted HTTP request, achieving remote code execution on the server. The issue carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) and was published on 2025-12-24.
The vulnerability enables exploitation by any unauthenticated attacker with network access, requiring low complexity and no user interaction. By sending a specially crafted HTTP request to the login page endpoint, the attacker can inject and execute arbitrary Perl code on the server, potentially compromising confidentiality, integrity, and availability with high impact.
Mitigation guidance is provided in official advisories, including CISA ICS Advisory ICSA-24-263-04 at https://www.cisa.gov/news-events/ics-advisories/icsa-24-263-04, the corresponding CSAF JSON file at https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2024/icsa-24-263-04.json, and the vendor support page at https://megasys.com/support/.
Details
- CWE(s)
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
The vulnerability enables unauthenticated remote code execution through improper input validation in a public-facing web application's Perl script, directly facilitating T1190: Exploit Public-Facing Application.