CVE-2019-6802

Pypiserver vulnerability

CVSS

6.1

EPSS

3.9%

EPSS pct

89th

Exploited

No known

CRLF Injection in pypiserver 1.2.5 and below allows attackers to set arbitrary HTTP headers and possibly conduct XSS attacks via a %0d%0a in a URI.

Affected vendor

Python

Affected product

Pypiserver

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness type (CWE)

CWE-74 — Injection
CWE-79 — Cross-Site Scripting (XSS)

Published

2019-01-25

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to low impact to confidentiality, low impact to integrity.

Its EPSS score of 3.9% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 89% of all scored CVEs.

Check your external exposure to CVE-2019-6802

Confirm whether Python Pypiserver is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2019-6802.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-6802

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-6802 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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