Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2021-39371

25
FAUCET Score

CVE-2021-39371 describes an XML External Entity (XXE) injection vulnerability in PyWPS versions prior to 4.4.5, potentially also affecting OWSLib 0.24.1. This flaw allows an unauthenticated attacker to read arbitrary files on the application server's filesystem. With a CVSS score of 7.5 (High), the vulnerability is easily exploitable over the network with low attack complexity and no user interaction, leading to high confidentiality impact. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
0.24.1CPE matchmatch criteria
cpe:2.3:a:osgeo:owslib:0.24.1:*:*:*:*:*:*:*
< 4.4.5CPE matchmatch criteria
cpe:2.3:a:osgeo:pywps:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.52%
Probability of exploitation in next 30 days
EPSS Percentile
72.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0152 is in the 54th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: pywpsFixed in: 4.5.0

Vendor Advisories (1)

pipGHSA-p9wf-3xpg-c9g5high

XML External Entity Injection in PyWPS

Sep 2, 2021

References

github.com / geopython/OWSLib/issues/790
Issue TrackingPatchThird Party Advisory
github.com / geopython/pywps/pull/616
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2021/09/msg00001.html
Mailing ListThird Party Advisory