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Octopus Server CVE-2024-4456

MEDIUM
Cross-site Scripting (XSS) (CWE-79)
2024-05-08 security@octopus.com
5.4
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
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.

Impact

CVSS score of 5.4 (MEDIUM). Attack characteristics: network attack vector, low complexity, low 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.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAI

In affected versions of Octopus Server with certain access levels it was possible to embed a Cross-Site Scripting payload on the audit page. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, 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. In affected versions of Octopus Server with certain access levels it was possible to embed a Cross-Site Scripting payload on the audit page. Affected products include: Octopus Octopus Server.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.4 MEDIUM
AV:N/AC:L/PR:L/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
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

DescriptionNVD

In affected versions of Octopus Server with certain access levels it was possible to embed a Cross-Site Scripting payload on the audit page.

Threat Intelligence Overview

EPSS Score
0.3%
Top 83% exploitable
Data Quality
2 sources
Confidence: Low

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 0.3%
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
No
Human Impact· derived
Medium

Priority Score

27
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +27
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

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:octopus:octopus_server:*:*:*:*:*:*:*:*
cpe:2.3:a:octopus:octopus_server:*:*:*:*:*:*:*:*
CVE-2018-18850 HIGH POC
8.8 Oct 31

In Octopus Deploy 2018.8.0 through 2018.9.x before 2018.9.1, an authenticated user with permission to modify deployment

CVE-2019-11632 HIGH POC
8.1 May 01

In Octopus Deploy 2019.1.0 through 2019.3.1 and 2019.4.0 through 2019.4.5, an authenticated user with the VariableViewUn

CVE-2026-4881 MEDIUM POC
6.0 Jun 04

Server-level configuration changes can be made by any authenticated low-privilege user in Octopus Server through a speci

CVE-2022-2572 CRITICAL
9.8 Nov 01

In affected versions of Octopus Server where access is managed by an external authentication provider, it was possible t

CVE-2022-2778 CRITICAL
9.8 Sep 30

In affected versions of Octopus Deploy it is possible to bypass rate limiting on login using null bytes. Rated critical

CVE-2018-11320 CRITICAL
9.8 May 21

In Octopus Deploy 2018.4.4 through 2018.5.1, Octopus variables that are sourced from the target do not have sensitive va

CVE-2026-0704 CRITICAL
9.1 Feb 25

Path traversal in Octopus Deploy allows removing files and file contents on the host through API manipulation. Enables d

CVE-2022-2782 CRITICAL
9.1 Oct 27

In affected versions of Octopus Server it is possible for a session token to be valid indefinitely due to improper valid

CVE-2026-92355 HIGH
8.7 Sep 16

Path traversal in Octopus Server allows an authenticated low-privilege user to overwrite arbitrary files on the server f

CVE-2026-101169 HIGH
8.7 Sep 29

Authenticated remote code execution in Octopus Server allows any user whose role grants permission to edit an Environmen

CVE-2026-102478 HIGH
8.7 Oct 07

Privilege escalation in Octopus Server lets an authenticated user who already holds permission to modify roles weaken a

CVE-2026-102488 HIGH
8.7 Oct 08

Incorrect authorization in Octopus Server causes the platform to evaluate multiple scoped permission assignments incorre

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