CVE-2026-48518

MultiJuicer: Login CSRF allows attacker to force victims into their team

Published Jun 15, 2026 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Description

MultiJuicer is used to run separate Juice Shop instances on a central kubernetes cluster without the need for local instances. In versions 8.0.0 through 10.0.0, the team join endpoint (POST /multi-juicer/api/teams/{team}/join) accepted requests with any Content-Type, including text/plain. Because that content type does not trigger a CORS preflight, an attacker could host a cross-site HTML form that auto-submits to the endpoint and forces a victim's browser to log in as the attacker's team. A successful, undetected attacker can cause victims to unwittingly solve Juice Shop challenges under the attacker's team identity. In a CTF context this lets the attacker inflate their team's score using other players' activity, and any sensitive data the victim enters into "their" Juice Shop ends up in the attacker's instance. The vulnerability is exploitable without any prior authentication; the victim
only needs to visit a page the attacker controls while having network access to the MultiJuicer deployment. SameSite=Strict on the session cookie does not mitigate this, because the attack plants a new cookie rather than relying on an existing one. This issue was fixed in version 10.0.1.

Analysis

Technical impact

The vulnerability arises from the team join endpoint accepting any Content‑Type, including text/plain, which bypasses the sameSite cookie restriction and allows the attacker to auto‑submit a form that forces the victim's browser to authenticate to the attacker's team. This results in the victim unknowingly solving challenges under the attacker's identity and any sensitive data they submit to the Juice Shop instance being stored in the attacker's instance.

Affected Systems

Affected product: juice‑shop multi‑juicer, versions 8.0.0 through 10.0.0. The issue was fixed in version 10.0.1.

Risk and Exploitability

The CVSS score of 4.3 indicates moderate severity; the EPSS score is less than 1%, suggesting low likelihood of exploitation. The vulnerability is exploit‑agnostic of authentication – an attacker simply hosts a malicious HTML form and lures a victim who has network access to the deployment to load the page. The attack is browser‑based and requires no special infrastructure. The vulnerability is not currently listed in the CISA KEV catalog.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

juice-shop

multi-juicer

affected

Version	Status	Constraints
`>= 8.0.0, < 10.0.1`	affected	—

No data.

Vendor Product Versions

Juice-shop

Multi-juicer

Version	Status	Scheme	Platform
`[8.0.0,10.0.1)`	affected	semver	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Update MultiJuicer to version 10.0.1 or later.
Configure the server to reject non‑JSON content types for the "/multi-juicer/api/teams/{team}/join" endpoint, allowing only application/json.
Restrict access to the join endpoint with network segmentation or firewall rules to trusted clients.

Generated by OpenCVE AI on June 18, 2026 at 01:11 UTC.

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.196% probability within 30 days)

Exploitation poc

Automatable no

Technical Impact partial

References

Link	Providers
https://github.com/juice-shop/multi-juicer/commit/75b08c3fdda410781d421bfdf041fb1e913d6b49
https://github.com/juice-shop/multi-juicer/issues/525
https://github.com/juice-shop/multi-juicer/security/advisories/GHSA-h759-hf7w-j6m6

History

Jun 23, 2026 9:30 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Juice-shop Juice-shop multi-juicer
Vendors & Products		Juice-shop Juice-shop multi-juicer

Jun 16, 2026 1:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Jun 15, 2026 8:30 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		MultiJuicer is used to run separate Juice Shop instances on a central kubernetes cluster without the need for local instances. In versions 8.0.0 through 10.0.0, the team join endpoint (POST /multi-juicer/api/teams/{team}/join) accepted requests with any Content-Type, including text/plain. Because that content type does not trigger a CORS preflight, an attacker could host a cross-site HTML form that auto-submits to the endpoint and forces a victim's browser to log in as the attacker's team. A successful, undetected attacker can cause victims to unwittingly solve Juice Shop challenges under the attacker's team identity. In a CTF context this lets the attacker inflate their team's score using other players' activity, and any sensitive data the victim enters into "their" Juice Shop ends up in the attacker's instance. The vulnerability is exploitable without any prior authentication; the victim only needs to visit a page the attacker controls while having network access to the MultiJuicer deployment. SameSite=Strict on the session cookie does not mitigate this, because the attack plants a new cookie rather than relying on an existing one. This issue was fixed in version 10.0.1.
Title		MultiJuicer: Login CSRF allows attacker to force victims into their team
Weaknesses		CWE-352
References		https://github.com/juice-shop/multi-juicer/commit/75b08c3fdda410781d421bfdf041fb1e913d6b49 https://github.com/juice-shop/multi-juicer/issues/525 https://github.com/juice-shop/multi-juicer/security/advisories/GHSA-h759-hf7w-j6m6
Metrics		cvssV3_1 `{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'}`