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CVE Record

CVE-2018-1000844: Square Open Source Retrofit version Prior to commit 4a693c5aeeef2be6c7ecf80e7b5ec79f6ab59437 contains a XML...

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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

Retrofit builds before the referenced fixing commit had an XXE issue in JAXB XML handling. If an affected application parsed attacker-controlled XML through that path, the impact could include server-side file disclosure or SSRF. The source bundle does not provide CVSS, affected version ranges, or evidence of active exploitation.

Executive priority

Treat this as dependency hygiene with potentially serious impact where untrusted XML is processed. Prioritize systems that accept XML from customers, partners, or public endpoints, but do not assume broad exposure without confirming JAXB usage.

Technical view

CVE-2018-1000844 describes an XML External Entity vulnerability in Square Open Source Retrofit before commit 4a693c5aeeef2be6c7ecf80e7b5ec79f6ab59437. The vulnerable area is JAXB processing. Reported outcomes are remote file reads and SSRF. The record says the issue was fixed after that commit.

Likely exposure

Exposure is likely limited to applications using vulnerable Retrofit code with JAXB/XML parsing reachable by untrusted XML input. The bundle does not identify package versions, CPEs, or specific releases, so teams must map dependencies to the fixing commit or vendor release notes.

Exploitation context

The source bundle does not cite public exploitation or KEV listing. The vulnerability class is externally triggerable when hostile XML reaches the affected JAXB path, but exploitation status and practical preconditions are not documented in the provided sources.

Researcher notes

The record lacks CVSS, CPEs, CWE mapping, and release-version detail. Focus analysis on commit ancestry, Retrofit JAXB converter usage, and trust boundaries around XML input. Do not claim active exploitation from the provided evidence.

Mitigation direction

  • Upgrade Retrofit to a release containing commit 4a693c5aeeef2be6c7ecf80e7b5ec79f6ab59437 or later.
  • Check Square Retrofit guidance for the packaged version that includes the fix.
  • Reduce exposure by rejecting untrusted XML where JAXB parsing is unnecessary.
  • Review XML parser settings for external entity and remote resource handling.

Validation and detection

  • Inventory applications and lockfiles for Retrofit usage and XML/JAXB converters.
  • Map installed Retrofit versions or commits against the fixing commit.
  • Confirm untrusted XML cannot reach the affected JAXB parsing path.
  • Verify patched builds are deployed in all runtime environments.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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ATT&CK lookup starting points

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description · low confidence lookup

Cloud metadata behavior lookup

The CVE wording references SSRF or metadata access, so cloud discovery and credential material review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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CVE-2018-1000844 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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