CVE-2025-51867Public exploitNetwork attack vector

Unauthorized LLM use via exposed story identifiers

Published Jul 22, 2025 · Updated Jul 23, 2025

IDOR in Deepfiction AI through June 3, 2025 allows remote authenticated users to consume other users' credits in LLM chats. The create-story-part API relies solely on treatment_id and user_id for access control, while the public story browser exposes the corresponding id and author_id values. A valid account is required; the documented exploit consumes a victim's chat credits without altering data or interrupting service.

CVSS severity6.5
Medium
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

IDOR in Deepfiction AI through June 3, 2025 allows remote authenticated users to consume other users' credits in LLM chats. The create-story-part API relies solely on treatment_id and user_id for access control, while the public story browser exposes the corresponding id and author_id values. A valid account is required; the documented exploit consumes a victim's chat credits without altering data or interrupting service.

The record

CVE
CVE-2025-51867
Published
Jul 22, 2025
Updated
Jul 23, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-639, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Jul 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-639Authorization Bypass Through User-Controlled Key
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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