CVE-2023-36809: PYSEC-2026-1499 - Kiwi TCMS's misconfigured HTTP headers allow stored XSS execution with Firefox

CVE-2023-36809 · Severity: low · CVSS 3.1 · Published 2026-07-07

Kiwi TCMS's misconfigured HTTP headers allow stored XSS execution with Firefox

Technologies: kiwitcms (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2023-36809 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2023-36809 being exploited in the wild.
How severe is CVE-2023-36809?
Low severity, with a CVSS score of 3.1, published 7 July 2026.
Which products and versions are affected?
kiwitcms (PyPI) ECOSYSTEM:introduced=0,fixed=12.5.
Is there a fix for CVE-2023-36809?
Yes. kiwitcms (PyPI): upgrade to 12.5 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2023-36809?
Check whether you run kiwitcms (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

  • kiwitcms (PyPI): upgrade to 12.5 or later
    pip install "kiwitcms>=12.5"

Affected products

  • kiwitcms (PyPI) ECOSYSTEM:introduced=0,fixed=12.5

Identifiers

  • CVE-2023-36809
  • GHSA-jpgw-2r9m-8qfw
  • PYSEC-2026-1499

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