CVE-2019-8451

MEDIUM EXPLOITED NUCLEI

Jira Server 7.6.0-8.3.9 - Server-Side Request Forgery via Gadgets MakeRequest Endpoint

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2019-8451 has been observed exploited in the wild (reported by VulnCheck KEV). EIP tracks 6 public exploits from researchers including jas502n, 0xbug, h0ffayyy. A Nuclei detection template is also available.

AI-analyzed exploit summary This repository contains a Python script that exploits CVE-2019-8451, an SSRF vulnerability in Jira before version 8.4.0. The script sends a crafted request to the vulnerable endpoint to access internal network resources.

Description

The /plugins/servlet/gadgets/makeRequest resource in Jira before version 8.4.0 allows remote attackers to access the content of internal network resources via a Server Side Request Forgery (SSRF) vulnerability due to a logic bug in the JiraWhitelist class.

Exploits (6)

nomisec WORKING POC 31 stars
by jas502n · infoleak
https://github.com/jas502n/CVE-2019-8451

This repository contains a Python script that exploits CVE-2019-8451, an SSRF vulnerability in Jira before version 8.4.0. The script sends a crafted request to the vulnerable endpoint to access internal network resources.

Classification
Working Poc 95%
Attack Type
Ssrf
Complexity
Trivial
Reliability
Reliable
Target: Atlassian Jira before 8.4.0
No auth needed
Prerequisites: Network access to the vulnerable Jira instance
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec WORKING POC 10 stars
by 0xbug · infoleak
https://github.com/0xbug/CVE-2019-8451

This PoC demonstrates an SSRF vulnerability in Atlassian Jira via the gadgets/makeRequest endpoint, allowing attackers to make arbitrary requests to internal or external resources. The exploit leverages URL manipulation to bypass access controls.

Classification
Working Poc 90%
Attack Type
Ssrf
Complexity
Trivial
Reliability
Reliable
Target: Atlassian Jira Server
No auth needed
Prerequisites: Network access to the Jira instance
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec SCANNER 7 stars
by h0ffayyy · remote
https://github.com/h0ffayyy/Jira-CVE-2019-8451

This repository contains a Python script to scan for CVE-2019-8451, a pre-authentication SSRF vulnerability in Jira. It checks the version and attempts an SSRF request to determine vulnerability status.

Classification
Scanner 90%
Attack Type
Ssrf
Complexity
Trivial
Reliability
Reliable
Target: Atlassian Jira versions 7.6.0 to 7.13.8 and 8.0.0 to 8.3.4
No auth needed
Prerequisites: Network access to the target Jira instance
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec WORKING POC 1 stars
by ianxtianxt · remote
https://github.com/ianxtianxt/CVE-2019-8451

This PoC demonstrates an SSRF vulnerability in Jira by exploiting the `/plugins/servlet/gadgets/makeRequest` endpoint without authentication. It sends a crafted request to an attacker-controlled URL, confirming the vulnerability.

Classification
Working Poc 80%
Attack Type
Ssrf
Complexity
Trivial
Reliability
Reliable
Target: Atlassian Jira (versions affected by CVE-2019-8451)
No auth needed
Prerequisites: Network access to the target Jira instance · Target Jira instance must be vulnerable to CVE-2019-8451
devstral-2 · analyzed Feb 16, 2026 Full analysis →
nomisec WORKING POC
by iuds · poc
https://github.com/iuds/CVE-2019-8451

This script exploits CVE-2019-8451, an SSRF vulnerability in Atlassian products, by crafting a malicious request to the Gadgets plugin endpoint. It checks for session leakage indicators like 'set-cookie' and the X-AUSERNAME header in the response.

Classification
Working Poc 95%
Attack Type
Ssrf
Complexity
Trivial
Reliability
Reliable
Target: Atlassian products (e.g., Jira, Confluence)
No auth needed
Prerequisites: access to the target Atlassian instance · network connectivity to the SSRF target
devstral-2 · analyzed May 19, 2026 Full analysis →
nomisec WORKING POC
by b0ul1 · infoleak
https://github.com/b0ul1/CVE-2019-8451

This script is a proof-of-concept for CVE-2019-8451, an SSRF vulnerability in Atlassian products. It crafts a malicious request to the target URL and checks for indicators of a successful SSRF attack, such as the presence of 'set-cookie' in the response body.

Classification
Working Poc 90%
Attack Type
Ssrf
Complexity
Trivial
Reliability
Reliable
Target: Atlassian products (specific version not specified)
No auth needed
Prerequisites: Access to the target Atlassian instance
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Nuclei Templates (1)

Jira <8.4.0 - Server-Side Request Forgery
MEDIUMby TechbrunchFR
Shodan: http.component:"Atlassian Jira" || http.component:"atlassian jira"

References (1)

Core 1
Core References
Issue Tracking, Vendor Advisory x_refsource_confirm
https://jira.atlassian.com/browse/JRASERVER-69793

Scores

CVSS v3 6.5
EPSS 0.9407
EPSS Percentile 99.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Details

VulnCheck KEV 2023-12-06
CWE
CWE-918
Status published
Products (1)
atlassian/jira_server 7.6.0 - 8.4.0
Published Sep 11, 2019
Tracked Since Feb 18, 2026