BigFix WebUI — CraftedSignal Threat Feedhttps://feed.craftedsignal.io/products/bigfix-webui/Trending threats, MITRE ATT&CK coverage, and detection metadata. Fed continuously.Hugoenhello@craftedsignal.iohello@craftedsignal.ioMon, 11 May 2026 10:42:58 +0000HCL BigFix WebUI Information Disclosure Vulnerabilitieshttps://feed.craftedsignal.io/briefs/2026-05-hcl-bigfix-webui-info-disclosure/Mon, 11 May 2026 10:42:58 +0000hello@craftedsignal.iohttps://feed.craftedsignal.io/briefs/2026-05-hcl-bigfix-webui-info-disclosure/A remote, authenticated attacker can exploit multiple vulnerabilities in HCL BigFix WebUI applications to disclose sensitive information.Multiple information disclosure vulnerabilities exist within the HCL BigFix WebUI applications. An authenticated, remote attacker can exploit these vulnerabilities to gain unauthorized access to sensitive information. The vulnerabilities stem from inadequate access controls and insufficient sanitization of user-supplied inputs. Successful exploitation could lead to exposure of confidential data, potentially impacting the integrity and confidentiality of the affected system. The scope of impact is limited to organizations utilizing vulnerable versions of HCL BigFix WebUI.

Attack Chain

  1. An attacker gains valid credentials to the HCL BigFix WebUI through compromised accounts or credential harvesting.
  2. The attacker authenticates to the HCL BigFix WebUI with the acquired credentials.
  3. The attacker crafts a malicious HTTP request targeting a vulnerable endpoint within the WebUI.
  4. The malicious request exploits insufficient access controls to access unauthorized data.
  5. The attacker may also exploit insufficient sanitization of user-supplied inputs, leading to information disclosure.
  6. The WebUI processes the request and inadvertently exposes sensitive information in the response.
  7. The attacker parses the response and extracts the disclosed information.
  8. The attacker uses the disclosed information for further malicious activities, such as lateral movement or privilege escalation.

Impact

Successful exploitation of these vulnerabilities could lead to the disclosure of sensitive information, such as user credentials, configuration details, or internal network information. This information could be leveraged by an attacker to further compromise the affected system or network. The number of affected organizations is currently unknown, but the impact on each organization could be significant, depending on the sensitivity of the disclosed information.

Recommendation

  • Deploy the Sigma rules provided in this brief to detect potential exploitation attempts within your environment.
  • Review and enforce strong authentication and authorization mechanisms for the HCL BigFix WebUI.
  • Conduct regular security assessments and penetration testing of the HCL BigFix WebUI to identify and remediate potential vulnerabilities.
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