CVE-2025-0607: Logo Cloud XSS Phishing Vulnerability

CVE-2025-0607 Overview

CVE-2025-0607 is an Improper Encoding or Escaping of Output vulnerability [CWE-116] in Logo Software Inc. Logo Cloud. The flaw affects all versions of Logo Cloud prior to 2.57 and enables phishing attacks against authenticated users. An attacker with high privileges can craft output that is not properly encoded, allowing injected content to render in a way that deceives victims. Exploitation requires user interaction, limiting mass exploitation but keeping targeted phishing scenarios viable.

Critical Impact
Attackers can leverage improperly escaped output in Logo Cloud to deliver phishing payloads to authenticated users, potentially leading to credential theft and account compromise.

Affected Products

Logo Software Inc. Logo Cloud, all versions before 2.57

Discovery Timeline

2025-10-06 - CVE-2025-0607 published to NVD
2026-10-09 - Last updated in NVD database

Technical Details for CVE-2025-0607

Vulnerability Analysis

The vulnerability is categorized under [CWE-116] Improper Encoding or Escaping of Output. Logo Cloud fails to correctly encode or escape data before rendering it in downstream output contexts. When attacker-controlled content reaches a browser or client interface without proper encoding, it can be interpreted as structured content rather than literal data. This mismatch enables phishing payloads to appear as legitimate application content.

The Turkish national CERT advisories (USOM TR-25-0318 and Siber Güvenlik TR-25-0318) confirm the issue affects Logo Cloud deployments and recommend upgrading to version 2.57 or later.

Root Cause

The root cause is missing or incomplete output encoding in Logo Cloud components that render user-influenced data. When the application assembles response content, it does not neutralize characters or sequences that carry special meaning in the output context. This allows crafted input to alter the structure or presentation of the rendered output rather than being treated as inert text.

Attack Vector

Exploitation requires network access, high privileges on the Logo Cloud tenant, and victim interaction. An authenticated attacker injects content into a field or workflow that is later rendered to another user. The victim views the manipulated output and is tricked into interacting with phishing content presented inside the trusted Logo Cloud interface. Confidentiality, integrity, and availability impacts are each limited in scope.

No public proof-of-concept or exploit code is available for CVE-2025-0607. See the vendor and CERT advisories referenced above for technical context.

Detection Methods for CVE-2025-0607

Indicators of Compromise

Logo Cloud user reports of unexpected links, dialogs, or branding prompting for credentials inside the application interface.
Outbound requests from user browsers to unfamiliar domains immediately after rendering Logo Cloud content.
Logo Cloud records containing HTML, script tags, or encoded control characters in fields intended for plain text.

Detection Strategies

Inspect Logo Cloud application logs for input containing markup, URL schemes, or escape sequences in business data fields.
Correlate authenticated session activity with anomalous content creation by privileged users prior to phishing reports.
Monitor web proxy and DNS telemetry for user navigation from Logo Cloud sessions to newly registered or low-reputation domains.

Monitoring Recommendations

Enable detailed audit logging on Logo Cloud tenants and forward events to a central SIEM for correlation.
Track privileged account actions in Logo Cloud, as exploitation requires high privileges and user interaction.
Alert on user-reported phishing originating from internal Logo Cloud URLs to accelerate incident triage.

How to Mitigate CVE-2025-0607

Immediate Actions Required

Upgrade Logo Cloud to version 2.57 or later across all tenants.
Review recent privileged account activity for suspicious content creation or modifications.
Notify end users about the risk of phishing content appearing inside Logo Cloud and reinforce reporting procedures.

Patch Information

Logo Software addressed the vulnerability in Logo Cloud 2.57. Administrators should confirm their deployment is running the patched release. Refer to the USOM TR-25-0318 notification and the Siber Güvenlik TR-25-0318 advisory for official guidance.

Workarounds

Restrict high-privilege Logo Cloud roles to a minimum set of trusted administrators until patching is complete.
Apply conditional access or multi-factor authentication to privileged Logo Cloud accounts to raise the exploitation bar.
Train users to validate authentication prompts and external links encountered within Logo Cloud sessions.

bash

# Verify Logo Cloud version is patched (2.57 or later)
# Replace with your tenant-specific administrative check
curl -s -H "Authorization: Bearer $TOKEN" \
  https://<logo-cloud-tenant>/api/system/version