What is the CVSS score of CVE-2021-23925?

CVE-2021-23925 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.6%.

Devolutions Server CVE-2021-23925

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2021-04-01 cve@mitre.org

XSS Devolutions Server Devolutions

6.1

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-79 OWASP Top 10:2025 A05:2025 - Injection ASVS 5.0 V1 - Encoding and Sanitization Output encoding, context-aware escaping MITRE ATT&CK 2 techniques across 2 tactics: Initial Access, Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS score of 6.1 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, user interaction required.
Exploit ScenarioDerived	A remote attacker could inject malicious scripts into web pages viewed by other users by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

No patch listed yet 0.6% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAI

An issue was discovered in Devolutions Server before 2020.3. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. An issue was discovered in Devolutions Server before 2020.3. There is a cross-site scripting (XSS) vulnerability in entries of type Document. Affected products include: Devolutions Devolutions Server. Version information: before 2020.3..

Know when Devolutions Server gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

DescriptionNVD

An issue was discovered in Devolutions Server before 2020.3. There is a cross-site scripting (XSS) vulnerability in entries of type Document.

Threat Intelligence Overview

EPSS Score

0.6%

Top 56% exploitable

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 0.6%

Patch available No

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +1

CVSS: +30

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Cross-Site Scripting MEDIUM

Cross-Site Scripting occurs when an application accepts untrusted data and sends it to a web browser without proper validation or encoding.

Affected Products (CPE)NVD

cpe:2.3:a:devolutions:devolutions_server:*:*:*:*:*:*:*:*

More in Devolutions Server

View all

CVE-2026-3204 CRITICAL Act Now

9.8 Mar 03

Input validation flaw in Devolutions Server error message page enables remote spoofing attacks.

CVE-2026-3224 CRITICAL Act Now

9.8 Mar 03

Azure AD auth bypass in Devolutions Server 2025.3.15.0 and earlier.

CVE-2026-0610 CRITICAL Act Now

9.8 Jan 19

Devolutions Server 2025.3.1 through 2025.3.6 contains a SQL injection vulnerability in the remote sessions component tha

CVE-2026-3130 CRITICAL Act Now

9.8 Mar 03

Behavioral control bypass in Devolutions Server 2025.3.15 allows authenticated users to exploit delete permissions.

CVE-2024-2921 CRITICAL Act Now

9.8 Mar 26

Improper access control in PAM vault permissions in Devolutions Server 2024.1.10.0 and earlier allows an authenticated u

CVE-2021-23921 CRITICAL Act Now

9.1 Apr 01

An issue was discovered in Devolutions Server before 2020.3. Rated critical severity (CVSS 9.1), this vulnerability is r

CVE-2025-11957 CRITICAL Act Now

9.0 Oct 22

Authenticated privilege escalation in Devolutions Server 2025.2.12.0 and earlier lets any holder of a basic (low-privile

CVE-2025-11619 HIGH This Week

8.8 Oct 15

Devolutions Server 2025.3.2 and earlier fails to properly validate certificates when connecting to gateways, letting an

CVE-2026-17568 HIGH This Week

8.8 Jul 27

Privilege escalation in Devolutions Server allows an authenticated non-administrative user holding the user-group member

CVE-2025-12485 HIGH This Week

8.8 Nov 06

Improper privilege management during pre-MFA cookie handling in Devolutions Server allows a low-privileged authenticated

CVE-2025-13757 HIGH This Week

8.8 Nov 27

SQL Injection vulnerability in last usage logs in Devolutions Server.2.20, through 2025.3.8. Rated high severity (CVSS 8

CVE-2024-2915 HIGH This Week

8.8 Mar 26

Improper access control in PAM JIT elevation in Devolutions Server 2024.1.6 and earlier allows an attacker with access t

Same weakness CWE-79 – Cross-site Scripting (XSS)

View all

CVE-2020-3580 MEDIUM POC

6.1

CVE-2013-7389 MEDIUM POC

4.3

CVE-2021-25299 MEDIUM POC

6.1

CVE-2014-2120 MEDIUM

6.1

CVE-2023-40000 HIGH POC

8.3

CVE-2016-8581 MEDIUM POC

6.1

CVE-2013-5223 MEDIUM POC

5.4

CVE-2025-52367 MEDIUM POC

5.4

Same technique XSS

View all

CVE-2017-9248 CRITICAL POC

9.8

CVE-2013-1710 CRITICAL POC

10.0

CVE-2024-52875 HIGH POC

8.8

References

Advisories & patches

ADVISORY https://devolutions.net/security/advisories/devo-2021-0002

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

Back