What is CVE-2019-6802?

CVE-2019-6802 is a medium-severity vulnerability in Python Pypiserver, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.1/10. Published 2019-01-25.

How severe is CVE-2019-6802?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Is CVE-2019-6802 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Python Pypiserver

CVE-2019-6802

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.

Published 2019-01-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.038 (89.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.038 · newest: 0.038 · change: 0.000

Affected products

Python Pypiserver

Weakness classification (CWE)

Public proof-of-concept exploits

References

github.com/pypiserver/pypiserver/issues/237 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-6802?: CVE-2019-6802 is a medium-severity vulnerability in Python Pypiserver, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.1/10. Published 2019-01-25.
How severe is CVE-2019-6802?: Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2019-6802 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.