# CVE-2018-19443: Tryton session fixation in bus connection

Source: https://junglewise.ai/threats/cve-2018-19443-tryton-session-fixation-in-bus-connection  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2018-11-22. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2018-19443 · Severity: low · CVSS 3 · Published 2018-11-22

Tryton is an open-source business management framework used for enterprise resource planning. The vulnerability allows attackers on the network to intercept user session credentials sent in cleartext over unencrypted bus connections. An attacker could steal an active user's session and impersonate them without requiring authentication.

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

## Quick answers

**Is CVE-2018-19443 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2018-19443 being exploited in the wild.

**How severe is CVE-2018-19443?** Low severity, with a CVSS score of 3, published 22 November 2018.

**Which products and versions are affected?** tryton (PyPI) ECOSYSTEM:introduced=5.0.0,fixed=5.0.1.

**Is there a fix for CVE-2018-19443?** Yes. tryton (PyPI): upgrade to 5.0.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2018-19443 attacked?** It is attacked over the network.

**Am I affected by CVE-2018-19443?** Check whether you run tryton (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

- tryton (PyPI): upgrade to 5.0.1 or later

  ```sh
  pip install "tryton>=5.0.1"
  ```


## Technical details

The vulnerability is a session fixation issue (CWE-384) in Tryton 5.0.0 where the client attempts to establish bus connections without proper SSL/TLS encryption under certain circumstances. The root cause is in bus.py and jsonrpc.py where the SSL property is evaluated before the connection is fully established, causing it to default to false and attempt cleartext connections. An attacker positioned for man-in-the-middle network interception can capture the session token from the unencrypted connection headers. The attack requires network access to the bus communication channel but no authentication or user interaction. This was fixed in version 5.0.1.

## Affected products

- Tryton Tryton 5.0.0

## Identifiers

- CVE-2018-19443
- GHSA-32w7-9whp-cjp9
- PYSEC-2018-77

## Timeline

- 2018-11-29: disclosed
- 2018-11-29: patched: Fixed in version 5.0.1

## References

- [https://bugs.tryton.org/issue7792](https://bugs.tryton.org/issue7792)

## Related threats

- [PYSEC-2026-3390 - Tryton vulnerable to arbitrary command execution](https://junglewise.ai/threats/cve-2014-6633-tryton-vulnerable-to-arbitrary-command-execution)
- [PYSEC-2026-1054 - Tryton Directory Traversal vulnerability](https://junglewise.ai/threats/cve-2013-4510-tryton-directory-traversal-vulnerability)
- [PYSEC-2026-741 - XML Entity Expansion in trytond and proteus](https://junglewise.ai/threats/cve-2022-26662-xml-entity-expansion-in-trytond-and-proteus)
- [PYSEC-2026-740 - Improper Restriction of XML External Entity Reference in trytond and proteus](https://junglewise.ai/threats/cve-2022-26661-improper-restriction-of-xml-external-entity-reference-in-trytond)
- [Tryton allows users to read the hashed password](https://junglewise.ai/threats/cve-2016-1241-tryton-allows-users-to-read-the-hashed-password)