CVE-2025-12485: Devolutions Server · Improper Privilege Management
Affects Devolutions ServerSource CVE Database V5
Not known to be exploited · CVSS 8.8 High.
Data as of 26 Oct 2026, 17:16 UTC
- 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:HExploitation evidence
Disclosed: evidence found.
CVE published 6 Nov 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| Devolutions Server | Affected
| Fixed in– |
AI-suggested
- Immediate upgrade to a patched version of Devolutions Server once available, as no patches are currently provided.
- Implement strict network segmentation and access controls to limit the ability of low-privileged users to access the Devolutions Server environment.
- Monitor authentication logs and pre-MFA cookie usage patterns for anomalies indicative of replay attacks or impersonation attempts.
- Enforce strong session management policies, including short session lifetimes and binding sessions to client attributes to reduce cookie replay risks.
- Employ additional layers of authentication and authorization checks beyond cookie validation during the pre-MFA phase.
- Conduct regular security audits and penetration testing focused on authentication mechanisms and privilege escalation vectors.
- Educate administrators and users about the risks of credential reuse and the importance of reporting suspicious activities promptly.
- Use endpoint detection and response (EDR) tools to identify lateral movement attempts following exploitation.
- Restrict administrative privileges and implement the principle of least privilege to minimize potential damage from compromised accounts.
- 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