---
id: CVE-2008-1396
aliases:
  - GHSA-hjp5-hv33-q58g
  - PYSEC-2026-732
title: Plone credentials stored in session cookie
summary: Plone credentials stored in session cookie
severity: medium
vendor: plone
product: plone
ecosystem: pip
affected:
  - plone <= 3.1.7
published: '2022-05-01'
updated: '2026-07-06'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-hjp5-hv33-q58g'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2008-1396'
  - url: 'https://exchange.xforce.ibmcloud.com/vulnerabilities/41421'
  - url: 'https://github.com/plone/Plone'
  - url: 'http://securityreason.com/securityalert/3754'
  - url: 'http://www.procheckup.com/Hacking_Plone_CMS.pdf'
  - url: 'http://www.securityfocus.com/archive/1/489544/100/0/threaded'
tags:
  - osv
  - pip
epss: 0.01139
epssPercentile: 0.64724
ingestedAt: '2026-07-08T18:25:50.264Z'
---

## Overview

Plone CMS 3.1.x uses invariant data (a client username and a server secret) when calculating an HMAC-SHA1 value for an authentication cookie, which makes it easier for remote attackers to gain permanent access to an account by sniffing the network.

## Affected packages

- `plone <= 3.1.7`

## Remediation

Refer to the advisory for the patched release.