CVE-2021-41125Network attack vector

Credential leakage via unrestricted HTTP authentication

Published Oct 6, 2021 · Updated Aug 4, 2024

Information disclosure in Scrapy before 1.8.1 or 2.5.1 allows remote authenticated users to expose HTTP credentials via requests. HttpAuthMiddleware attaches configured http_user and http_pass credentials to every request, including robots.txt requests and redirects to unintended domains. Exploitation requires a spider configured with global HTTP authentication and causes credential disclosure to the request destination, without evidence of integrity or availability impact.

CVSS severity6.9
Medium
EPSS probability1.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information disclosure in Scrapy before 1.8.1 or 2.5.1 allows remote authenticated users to expose HTTP credentials via requests. HttpAuthMiddleware attaches configured http_user and http_pass credentials to every request, including robots.txt requests and redirects to unintended domains. Exploitation requires a spider configured with global HTTP authentication and causes credential disclosure to the request destination, without evidence of integrity or availability impact.

The record

CVE
CVE-2021-41125
Published
Oct 6, 2021
Updated
Aug 4, 2024
Vendor
Scrapy
Product
Scrapy
Classifications
CWE-200, CWE-522
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 6, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=< 1.8.1
  2. Affected versionversion=>= 2.0.0, < 2.5.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Scrapy · Scrapyversion=< 1.8.1; version=>= 2.0.0, < 2.5.1

Published CVSS scores

6.9GitHub Advisory DatabaseCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
CWE-522Insufficiently Protected Credentials

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo