CVE-2025-55573Public exploitNetwork attack vector

Browser script execution via imported Playground conversation

Published Aug 22, 2025 · Updated Aug 22, 2025

Cross-site scripting in QuantumNous new-api 0.8.5.2 and earlier allows remote attackers to execute script in another user's browser. The Console Playground's Show Debug view renders crafted conversation content as executable markup instead of neutralizing it, while exported files preserve the payload. Execution requires a user, including an administrator, to import the crafted conversation and enable Show Debug; the script then runs in that user's browser context.

CVSS severity8.8
High
EPSS probability0.42%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in QuantumNous new-api 0.8.5.2 and earlier allows remote attackers to execute script in another user's browser. The Console Playground's Show Debug view renders crafted conversation content as executable markup instead of neutralizing it, while exported files preserve the payload. Execution requires a user, including an administrator, to import the crafted conversation and enable Show Debug; the script then runs in that user's browser context.

The record

CVE
CVE-2025-55573
Published
Aug 22, 2025
Updated
Aug 22, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-79, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 22, 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 privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.002User Execution: Malicious File

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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