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Fencer Vulns
critical 9.8

CVE-2020-24379 json

WebDAV implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to XXE injection.

published 2020-09-09 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-17111

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.4%
EPSS 3.4% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

WebDAV implementation in Yaws web server versions 1.81 to 2.0.7 is vulnerable to XXE injection.

Patch / fix

  • yaws Debian 14, Debian 13, Debian 12 2.0.8+dfsg-1

debian advisories DEBIAN-CVE-2020-24379

  • yaws Ubuntu 18.04 LTS 2.0.4+dfsg-2ubuntu0.1
  • yaws Ubuntu Pro 16.04 LTS 2.0.2-1ubuntu0.1~esm1
  • yaws Ubuntu Pro 20.04 LTS 2.0.7+dfsg-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2020-24379

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-24379 updated cvss 6.3

yaws: XXE injection WebDAV implementation

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.35% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • packetstormsecurity.com https://packetstormsecurity.com/files/159106/Yaws-2.0.7-XML-Injection-Command-Injection.html referenced PoC, tagged "exploit" by a source, unverified
  • github.com https://github.com/vulnbe/poc-yaws-dav-xxe referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-611 Improper Restriction of XML External Entity Reference

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.