XML external entity injection in Atlassian Application Links
Priority MEDIUM 41CWE-611Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA.
Summary
The OAuthHelper in Atlassian Application Links before version 5.0.10, from version 5.1.0 before version 5.1.3, and from version 5.2.0 before version 5.2.6 used an XML document builder that was vulnerable to XXE when consuming a client OAuth request. This allowed malicious oauth application linked applications to probe internal network resources by requesting internal locations, read the contents of files and also cause an out of memory exception affecting availability via an XML External Entity vulnerability.
Why it matters now
EPSS 0.01633 76th percentileScored 2026-11-07
Fix Fixed Application Links (Atlassian): 5.0.10, 5.1.3, 5.2.6
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Atlassian | Application Links | before 5.0.10; 5.1.0 and later; before 5.1.3; 5.2.0 and later; before 5.2.6 | 5.0.10, 5.1.3, 5.2.6 | Patch available | CNA |
- Application Links VendorAtlassian Affected before 5.0.10; 5.1.0 and later; before 5.1.3; 5.2.0 and later; before 5.2.6 Fixed in 5.0.10, 5.1.3, 5.2.6 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:atlassian:application_links:*:*:*:*:*:*:*:* | before 5.0.10; 5.1.0 to before 5.1.3; 5.2.0 to before 5.2.6 | Vulnerable | Atlassian |
- cpe:2.3:a:atlassian:application_links:*:*:*:*:*:*:*:* Versions before 5.0.10; 5.1.0 to before 5.1.3; 5.2.0 to before 5.2.6 Vulnerable ·Atlassian
Remediation
- Fix · CNA Application Links (Atlassian) Fixed in 5.0.10, 5.1.3, 5.2.6
Timeline
- 2026-10-02 Threatist record created from CVE-2017-18111
- 2026-10-03 Alias added: GHSA-9563-9277-f9w9
References
More Atlassian Application Links vulnerabilities
- TI-2017-13304 Server-side request forgery in Atlassian Application Links CVSS 3.0HIGH 7.2
- TI-2018-14346 Cross-site scripting in Atlassian Application Links CVSS 3.1MEDIUM 5.4
- TI-2017-12406 Cross-site scripting in Atlassian Application Links CVSS 3.0MEDIUM 6.1
- TI-2019-14513 Missing authentication in Atlassian Application Links CVSS 3.1MEDIUM 4.9
- TI-2018-03784 Cross-site scripting in Atlassian Application Links CVSS 3.0MEDIUM 4.8
- TI-2019-11197 Incorrect default permissions in Atlassian Application Links CVSS 3.1MEDIUM 4.3
Sources
- CVE-2017-18111 · CVE Program
- CVE-2017-18111 · NVD
- FIRST EPSS
- GHSA-9563-9277-f9w9 · GitHub Advisory Database · CC BY 4.0
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