What’s Vulnerable › Vulnerabilities

CVE-2026-78203: Ghostwriter before 7.1.2 Cross-Client Report Template Disclosure via Unauthorized Template Swap

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-24 · updated 2026-10-12
• Weakness: CWE-639

Description

Ghostwriter before 7.1.2 fails to validate template ownership in the report template swap endpoint, allowing attackers to attach client-scoped templates from other clients to their own reports. Attackers can exploit sequential template primary keys to enumerate and attach foreign templates, then generate reports to disclose template contents including letterhead, boilerplate, and methodology text.

Affected products

• GhostManager Ghostwriter: before 7.1.2 — fixed in 7.1.2

How to fix

Upgrade to a fixed version: GhostManager Ghostwriter 7.1.2. Check the vendor advisory for mitigations.

References

• https://github.com/GhostManager/Ghostwriter
• https://github.com/GhostManager/Ghostwriter/blob/v7.1.1/ghostwriter/reporting/views.py#L275-L315
• https://github.com/GhostManager/Ghostwriter/commit/5b2a4a297e44c823c16f65b1ba101c742791cd0b
• https://github.com/geo-chen/oss/blob/main/Ghostwriter.md
• https://www.vulncheck.com/advisories/ghostwriter-before-cross-client-report-template-disclosure-via-unauthorized-template-swap

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