CVE-2021-28938 Vulnerability Analysis & Exploit Details

CVE-2021-28938
Vulnerability Scoring

4.3
/10
Medium Risk

The vulnerability CVE-2021-28938 could compromise system integrity but typically requires user interaction to be exploited.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: Low
    Some privileges are necessary to exploit the vulnerability.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2021-28938 Details

Status: Modified

Last updated: 🕕 21 Nov 2024, 06:00 UTC
Originally published on: 🕕 13 Apr 2021, 06:15 UTC

Time between publication and last update: 1317 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVE-2021-28938 Vulnerability Summary

CVE-2021-28938: Siren Federate before 6.8.14-10.3.9, 6.9.x through 7.6.x before 7.6.2-20.2, 7.7.x through 7.9.x before 7.9.3-21.6, 7.10.x before 7.10.2-22.2, and 7.11.x before 7.11.2-23.0 can leak user information across thread contexts. This occurs in opportunistic circumstances when there is concurrent query execution by a low-privilege user and a high-privilege user. The former query might run with the latter query's privileges.

Assessing the Risk of CVE-2021-28938

Access Complexity Graph

The exploitability of CVE-2021-28938 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2021-28938

CVE-2021-28938 presents an accessible attack vector with minimal effort required. Restricting access controls and implementing security updates are critical to reducing exploitation risks.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2021-28938, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2021-28938, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: Low
    CVE-2021-28938 could lead to minor leaks of non-critical information without major privacy breaches.
  • Integrity: None
    CVE-2021-28938 poses no threat to data integrity.
  • Availability: None
    CVE-2021-28938 does not impact system availability.

Exploit Prediction Scoring System (EPSS)

The EPSS score estimates the probability that this vulnerability will be exploited in the near future.

EPSS Score: 0.05% (probability of exploit)

EPSS Percentile: 23.05% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 76.95% of others.

CVE-2021-28938 References

External References

CWE Common Weakness Enumeration

NVD-CWE-noinfo

Vulnerable Configurations

  • cpe:2.3:a:siren:federate:-:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:-:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.4-10.0.0:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.4-10.0.0:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.4-10.0.1:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.4-10.0.1:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.4-10.0.2:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.4-10.0.2:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.5-10.0.0:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.5-10.0.0:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.5-10.0.1:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.5-10.0.1:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.5-10.0.2:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.5-10.0.2:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.6-10.0.0:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.6-10.0.0:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.6-10.0.1:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.6-10.0.1:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.6-10.0.2:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.6-10.0.2:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.7-10.0.0:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.7-10.0.0:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.7-10.0.1:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.7-10.0.1:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.7-10.0.2:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.7-10.0.2:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.8-10.0.0:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.8-10.0.0:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.8-10.0.1:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.8-10.0.1:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.8-10.0.2:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.8-10.0.2:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.9-10.0.0:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.9-10.0.0:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.9-10.0.1:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.9-10.0.1:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.9-10.0.2:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.9-10.0.2:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.10-10.0.2:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.10-10.0.2:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.10-10.0.3:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.10-10.0.3:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.10-10.0.4:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.10-10.0.4:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.10-10.1.0:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.10-10.1.0:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.10-10.1.1:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.10-10.1.1:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.14-10.1.2:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.14-10.1.2:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.16-10.1.3-1:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.16-10.1.3-1:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:5.6.16-10.1.4:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:5.6.16-10.1.4:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.3.2-10.1.0:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.3.2-10.1.0:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.3.2-10.1.1:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.3.2-10.1.1:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.3.2-10.1.2:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.3.2-10.1.2:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.3.2-10.1.3-1:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.3.2-10.1.3-1:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.3.2-10.1.4:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.3.2-10.1.4:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.5.4-10.2.0:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.5.4-10.2.0:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.5.4-10.2.1:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.5.4-10.2.1:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.5.4-10.2.2:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.5.4-10.2.2:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.5.4-10.2.3:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.5.4-10.2.3:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.5.4-10.2.4:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.5.4-10.2.4:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.5.4-10.2.6:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.5.4-10.2.6:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.8.0-10.2.3:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.8.0-10.2.3:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.8.0-10.2.4:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.8.0-10.2.4:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.8.0-10.3.0:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.8.0-10.3.0:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.8.2-10.3.1:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.8.2-10.3.1:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.8.2-10.3.2:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.8.2-10.3.2:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.8.2-10.3.3:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.8.2-10.3.3:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.8.6-10.2.6:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.8.6-10.2.6:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.8.6-10.3.4:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.8.6-10.3.4:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.8.6-10.3.5:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.8.6-10.3.5:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.8.6-10.3.6:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.8.6-10.3.6:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.8.12-10.3.7:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.8.12-10.3.7:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:6.8.13-10.3.8:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:6.8.13-10.3.8:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:7.3.2-19.0:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:7.3.2-19.0:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:7.3.2-19.1:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:7.3.2-19.1:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:7.6.2-20.0:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:7.6.2-20.0:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:7.6.2-20.1:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:7.6.2-20.1:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:7.7.1-20.0:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:7.7.1-20.0:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:7.8.0-20.0:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:7.8.0-20.0:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:7.8.1-20.1:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:7.8.1-20.1:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:7.9.1-21.0:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:7.9.1-21.0:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:7.9.2-21.1:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:7.9.2-21.1:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:7.9.3-21.2:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:7.9.3-21.2:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:7.9.3-21.4:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:7.9.3-21.4:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:7.9.3-21.5:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:7.9.3-21.5:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:7.10.1-22.0:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:7.10.1-22.0:*:*:*:*:elasticsearch:*:*
  • cpe:2.3:a:siren:federate:7.10.2-22.1:*:*:*:*:elasticsearch:*:*
    cpe:2.3:a:siren:federate:7.10.2-22.1:*:*:*:*:elasticsearch:*:*

Protect Your Infrastructure against CVE-2021-28938: Combat Critical CVE Threats

Stay updated with real-time CVE vulnerabilities and take action to secure your systems. Enhance your cybersecurity posture with the latest threat intelligence and mitigation techniques. Develop the skills necessary to defend against CVEs and secure critical infrastructures. Join the top cybersecurity professionals safeguarding today's infrastructures.

Other 5 Recently Published CVEs Vulnerabilities

  • CVE-2024-43107 – Improper Certificate Validation (CWE-295) in the Gallagher Milestone Integration Plugin (MIP) permits unauthenticated messages (e.g. alarm events) ...
  • CVE-2024-41724 – Improper Certificate Validation (CWE-295) in the Gallagher Command Centre SALTO integration allowed an attacker to spoof the SALTO server. Thi...
  • CVE-2025-2133 – A vulnerability classified as problematic was found in ftcms 2.1. Affected by this vulnerability is an unknown functionality of the file /admin/ind...
  • CVE-2025-2132 – A vulnerability classified as critical has been found in ftcms 2.1. Affected is an unknown function of the file /admin/index.php/web/ajax_all_lists...
  • CVE-2025-2131 – A vulnerability was found in dayrui XunRuiCMS up to 4.6.3. It has been rated as problematic. This issue affects some unknown processing of the comp...