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VulnerabilityPublished

CVE-2025-12485: Devolutions Server · Improper Privilege Management

Affects Devolutions ServerSource CVE Database V5

0

Not known to be exploited · CVSS 8.8 High.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 48% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 Nov 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Devolutions ServerAffected
  • =2025.3.2.0
  • =0
Fixed in–

AI-suggested

  1. Immediate upgrade to a patched version of Devolutions Server once available, as no patches are currently provided.
  2. Implement strict network segmentation and access controls to limit the ability of low-privileged users to access the Devolutions Server environment.
  3. Monitor authentication logs and pre-MFA cookie usage patterns for anomalies indicative of replay attacks or impersonation attempts.
  4. Enforce strong session management policies, including short session lifetimes and binding sessions to client attributes to reduce cookie replay risks.
  5. Employ additional layers of authentication and authorization checks beyond cookie validation during the pre-MFA phase.
  6. Conduct regular security audits and penetration testing focused on authentication mechanisms and privilege escalation vectors.
  7. Educate administrators and users about the risks of credential reuse and the importance of reporting suspicious activities promptly.
  8. Use endpoint detection and response (EDR) tools to identify lateral movement attempts following exploitation.
  9. Restrict administrative privileges and implement the principle of least privilege to minimize potential damage from compromised accounts.
  10. Prepare incident response plans specifically addressing potential exploitation of authentication vulnerabilities.

Description

Improper privilege management during pre-MFA cookie handling in Devolutions Server allows a low-privileged authenticated user to impersonate another account by replaying the pre-MFA cookie.This does not bypass the target account MFA verification step. This issue affects the following versions : * Devolutions Server 2025.3.2.0 through 2025.3.5.0 * Devolutions Server 2025.2.15.0 and earlier

References

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