CVE-2025-66040Public exploit

Browser script execution via unescaped OAuth error

Published Nov 26, 2025 · Updated Nov 28, 2025

Cross-site scripting in Spotipy before 2.25.2 allows attackers to execute JavaScript in a user's browser through an OAuth callback. RequestHandler.do_GET in spotipy/oauth2.py places the URL-derived error parameter directly into an HTML status response without escaping it. Exploitation requires an active localhost OAuth callback server and user interaction with a crafted loopback URL; execution is limited to the localhost origin.

CVSS severity3.6
Low
EPSS probability0.16%
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 Spotipy before 2.25.2 allows attackers to execute JavaScript in a user's browser through an OAuth callback. RequestHandler.do_GET in spotipy/oauth2.py places the URL-derived error parameter directly into an HTML status response without escaping it. Exploitation requires an active localhost OAuth callback server and user interaction with a crafted loopback URL; execution is limited to the localhost origin.

The record

CVE
CVE-2025-66040
Published
Nov 26, 2025
Updated
Nov 28, 2025
Vendor
Spotipy
Product
Spotipy
Classifications
CWE-79, T1204.001
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 28, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.25.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Spotipy · Spotipyversion=< 2.25.2

Published CVSS scores

3.6GitHubCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

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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