# CVE-2019-1000021: slixmpp Incorrect Access Control

Source: https://junglewise.ai/threats/cve-2019-1000021-slixmpp-incorrect-access-control  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2019-02-04  
License: CC BY 4.0 with a link back

CVE-2019-1000021 · Severity: low · CVSS 3 · Published 2019-02-04

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.

Technologies: [slixmpp (PyPI)](https://junglewise.ai/threats/technologies/pypi-slixmpp). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2019-1000021 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2019-1000021 being exploited in the wild.

**How severe is CVE-2019-1000021?** Low severity, with a CVSS score of 3, published 4 February 2019.

**Which products and versions are affected?** slixmpp (PyPI) ECOSYSTEM:introduced=0,fixed=1.4.2.

**Is there a fix for CVE-2019-1000021?** Yes. slixmpp (PyPI): upgrade to 1.4.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2019-1000021?** Check whether you run slixmpp (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- slixmpp (PyPI): upgrade to 1.4.2 or later

  ```sh
  pip install "slixmpp>=1.4.2"
  ```


## Affected products

- slixmpp (PyPI) ECOSYSTEM:introduced=0,fixed=1.4.2

## Identifiers

- CVE-2019-1000021
- GHSA-4g62-mfwx-4q48
- PYSEC-2019-121

## Related threats

- [Slixmpp lacks SSL Certificate hostname validation in XMLStream](https://junglewise.ai/threats/cve-2022-45197-slixmpp-lacks-ssl-certificate-hostname-validation-in-xmlstream)
- [PYSEC-2019-51 - slixmpp version before commit 7cd73b594e8122dddf847953fcfc85ab4d316416 contains an incorrect Access…](https://junglewise.ai/threats/pysec-2019-51-slixmpp-version-before-commit-ee9d4269)
- [SleekXMPP and Slixmpp Incorrect Implementation of Message Carbons](https://junglewise.ai/threats/cve-2017-5591-sleekxmpp-and-slixmpp-incorrect-implementation-of-message-carbons)