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CVE-2018-1000850

25
FAUCET Score

CVE-2018-1000850 is a Directory Traversal vulnerability in Square Retrofit versions 2.0 through 2.4.0, specifically within the RequestBuilder class's addPathParameter method. An attacker could exploit this by manipulating encoded path parameters in POST, PUT, or DELETE requests to add or delete unauthorized resources. Rated 7.5 HIGH (CVSSv3), this vulnerability has a low attack complexity and high integrity impact, but no confidentiality or availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.0.0, < 2.5.0CPE matchmatch criteria
cpe:2.3:a:squareup:retrofit:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
4.03%
Probability of exploitation in next 30 days
EPSS Percentile
89.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0403 is in the 81st percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: com.squareup.retrofit2:retrofitFixed in: 2.5.0
redhatpatch availablevia redhat_api
Product: Red Hat Fuse 7.5.0Fixed in: retrofit
View patch

Vendor Advisories (2)

mavenGHSA-8p8g-f9vg-r7xrhigh

Directory Traversal vulnerability in Square Retrofit

Dec 21, 2018
redhatCVE-2018-1000850Important

retrofit: Directory traversal in RequestBuilder allows manipulation of resources

Oct 21, 2018

References

access.redhat.com / errata/RHSA-2019:3892
github.com / square/retrofit/blob/master/CHANGELOG.md
Release NotesThird Party Advisory
github.com / square/retrofit/commit/b9a7f6ad72073ddd40254c0058710e87a073047d
PatchThird Party Advisory
ihacktoprotect.com / post/retrofit-path-traversal
ExploitThird Party Advisory
lists.apache.org / thread.html/519eb0fd45642dcecd9ff74cb3e71c20a4753f7d82e2f07864b5108f%40%3Cdev.drill.apache.org%3E
lists.apache.org / thread.html/b0656d359c7d40ec9f39c8cc61bca66802ef9a2a12ee199f5b0c1442%40%3Cdev.drill.apache.org%3E
lists.apache.org / thread.html/f9bc3e55f4e28d1dcd1a69aae6d53e609a758e34d2869b4d798e13cc%40%3Cissues.drill.apache.org%3E