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Fencer Vulns
high 7.5

CVE-2019-1000021 json

slixmpp Incorrect Access Control

published 2019-02-04 7 y ago modified 2026-06-17 4 mo ago also GHSA-4g62-mfwx-4q48 , PYSEC-2019-121 , EUVD-2019-0130

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.3%
EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits
0
none known

Summary

slixmpp version before commit 7cd73b594e8122dddf847953fcfc85ab4d316416 contains an incorrect Access Control vulnerability in XEP-0223 plugin (Persistent Storage of Private Data via PubSub) options profile, used for the configuration of default access model that can result in all of the contacts of the victim can see private data having been published to a PEP node. This attack appears to be exploitable if the user of this library publishes any private data on PEP, the node isn't configured to be private. This vulnerability appears to have been fixed in commit 7cd73b594e8122dddf847953fcfc85ab4d316416 which is included in slixmpp 1.4.2.

Patch / fix

  • pypi slixmpp 1.4.2
  • slixmpp_project slixmpp 1.4.2
  • slixmpp Debian 14, Debian 13, Debian 12 1.4.2-1

debian advisories DEBIAN-CVE-2019-1000021

  • slixmpp Ubuntu 20.04 LTS 1.4.2-1

ubuntu advisories UBUNTU-CVE-2019-1000021

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

  • python-slixmpp openSUSE Tumbleweed 1.16.0-2.1
  • python-slixmpp openSUSE Tumbleweed 1.8.5-1.2
  • python-slixmpp Package Hub 15 1.3.0-bp150.3.3.1

opensuse advisories openSUSE-SU-2026:11272-1openSUSE-SU-2024:14165-1openSUSE-SU-2019:0169-1

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-2019-1000021 updated cvss 3.5

python-slixmpp: Improper acccess control in XEP-0223 plugin

  • 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

2.32% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • xmpp.org https://xmpp.org/extensions/xep-0223.html#howitworks referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N
GitHub 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
pypi slixmpp
<1.4.2
1.4.2

Classification

Weakness

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.