Description

An OS Command Injection vulnerability affecting Tuleap Enterprise Edition from 17.0 through 17.5 could allow an attacker to execute arbitrary commands on the server.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.8",
  "pubDate": "2026-10-12T11:17:09.673Z",
  "pubdate": "2026-10-12T11:17:09.673Z",
  "executiveSummary": "This vulnerability is an OS Command Injection flaw identified in Tuleap Enterprise Edition versions 17.0 through 17.5.\nThe vulnerability allows an unauthenticated or authenticated attacker to execute arbitrary system commands on the underlying server host, potentially leading to full system compromise.\nThe core issue stems from improper neutralization of special elements used in an OS command when processing user-supplied input.\nSuccessful exploitation grants the attacker the same permissions as the web server process, enabling unauthorized data access, lateral movement, or persistent system control.\nGiven the nature of Tuleap as an enterprise development and project management platform, the risk is critical as it permits complete administrative takeover of the application environment.\nOrganizations using the specified versions are at high risk of remote code execution (RCE) if the application is exposed to untrusted networks.",
  "technicalDetails": "The vulnerability manifests as an OS Command Injection, occurring when the application fails to adequately sanitize input before passing it to system-level shells or sub-process execution functions.\nIn Tuleap Enterprise Edition versions 17.0 through 17.5, specific application endpoints fail to restrict character sets or validate input against a strict whitelist, allowing for the injection of shell metacharacters such as ';', '|', '&&', or '`'.\nThe attack flow involves the submission of a maliciously crafted payload within an HTTP request parameter. When the server-side code handles this parameter, it improperly concatenates the unsanitized string into a system command executed by the operating system.\nOnce the injected commands are parsed by the shell, the attacker gains the ability to execute arbitrary binaries, scripts, or system utilities with the effective privileges of the Tuleap web server user (e.g., www-data or apache).\nThe lack of proper input validation at the application logic layer permits the attacker to break out of the intended application context and interact directly with the underlying Linux operating system.\nPost-exploitation activities are highly flexible; attackers can exfiltrate sensitive repository data, modify project databases, create new administrative user accounts, or deploy persistent backdoors to ensure long-term access to the Tuleap instance.\nBecause the execution environment often lacks restrictive sandboxing, the impact extends beyond the application directory to the entire host machine, potentially allowing for privilege escalation if local kernel vulnerabilities exist.\nThis vulnerability is particularly severe because it bypasses standard application-level access controls. Even if an attacker does not have valid credentials, the injection point may reside in a pre-authentication endpoint, making the system susceptible to automated exploitation attempts from external network vectors."
}