CVE-2018-1000844
XML External Entity (XXE) vulnerability in Square Retrofit
Square Open Source Retrofit version Prior to commit 4a693c5aeeef2be6c7ecf80e7b5ec79f6ab59437 contains a XML External Entity (XXE) vulnerability in JAXB that can result in An attacker could use this to remotely read files from the file system or to perform SSRF.. This vulnerability appears to have been fixed in After commit 4a693c5aeeef2be6c7ecf80e7b5ec79f6ab59437.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Square Open Source Retrofit version Prior to commit 4a693c5aeeef2be6c7ecf80e7b5ec79f6ab59437 contains a XML External Entity (XXE) vulnerability in JAXB that can result in An attacker could use this to remotely read files from the file system or to perform SSRF.. This vulnerability appears to have been fixed in After commit 4a693c5aeeef2be6c7ecf80e7b5ec79f6ab59437.
- Record
CVE-2018-1000844- CVSS 3.0
- 9.1 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - CVSS 2.0
- 6.4 Medium
AV:N/AC:L/Au:N/C:P/I:P/A:N - Weakness
- CWE-611
- Updated
- 2026-11-02
CVE List No score
Square Open Source Retrofit version Prior to commit 4a693c5aeeef2be6c7ecf80e7b5ec79f6ab59437 contains a XML External Entity (XXE) vulnerability in JAXB that can result in An attacker could use this to remotely read files from the file system or to perform SSRF.. This vulnerability appears to have been fixed in After commit 4a693c5aeeef2be6c7ecf80e7b5ec79f6ab59437.
- Record
CVE-2018-1000844- Updated
- 2026-11-02
EUVDEUVD-2018-0813 No score
Square Open Source Retrofit version Prior to commit 4a693c5aeeef2be6c7ecf80e7b5ec79f6ab59437 contains a XML External Entity (XXE) vulnerability in JAXB that can result in An attacker could use this to remotely read files from the file system or to perform SSRF.. This vulnerability appears to have been fixed in After commit 4a693c5aeeef2be6c7ecf80e7b5ec79f6ab59437.
- Record
EUVD-2018-0813- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-j379-9jr9-w5cq
XML External Entity (XXE) vulnerability in Square Retrofit
Square Open Source Retrofit versions prior to commit 4a693c5aeeef2be6c7ecf80e7b5ec79f6ab59437 contain a XML External Entity (XXE) vulnerability in JAXB. An attacker could use this to remotely read files from the file system or to perform SSRF. This vulnerability appears to have been fixed in commit 4a693c5aeeef2be6c7ecf80e7b5ec79f6ab59437.
- Record
GHSA-j379-9jr9-w5cq- CVSS 3.0
- 9.1 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-611
- Updated
- 2026-11-02
OSV
Square Open Source Retrofit version Prior to commit 4a693c5aeeef2be6c7ecf80e7b5ec79f6ab59437 contains a XML External Entity (XXE) vulnerability in JAXB that can result in An attacker could use this to remotely read files from the file system or to perform SSRF.. This vulnerability appears to have been fixed in After commit 4a693c5aeeef2be6c7ecf80e7b5ec79f6ab59437.
- Record
CVE-2018-1000844- CVSS 3.0
- 9.1 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
OSVGHSA-j379-9jr9-w5cq
XML External Entity (XXE) vulnerability in Square Retrofit
Square Open Source Retrofit versions prior to commit 4a693c5aeeef2be6c7ecf80e7b5ec79f6ab59437 contain a XML External Entity (XXE) vulnerability in JAXB. An attacker could use this to remotely read files from the file system or to perform SSRF. This vulnerability appears to have been fixed in commit 4a693c5aeeef2be6c7ecf80e7b5ec79f6ab59437.
- Record
GHSA-j379-9jr9-w5cq- CVSS 3.0
- 9.1 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-611
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
com.squareup.retrofit2:retrofitMaven |
2.0.0 up to 2.5.0 | 2.5.0 |
com.squareup.retrofit2:retrofitMaven |
2.0.0 up to 2.5.0, plus listed versions 2.0.12.0.22.1.02.2.02.3.02.4.0 |
2.5.0 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | epicosy/Retrofit-1 | 2024-05-31 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-1000844 is a critical vulnerability (CVSS 9.1) in Squareup Retrofit, published December 20, 2018. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 2.15%, the 82nd percentile. Fixed in com.squareup.retrofit2:retrofit 2.5.0.