---
id: CVE-2008-1393
aliases:
  - GHSA-593c-j348-f3gv
  - PYSEC-2026-731
title: Plone Improper Session Management
summary: Plone Improper Session Management
severity: high
vendor: plone
product: plone
ecosystem: pip
affected:
  - plone < 3.0
patched:
  - plone 3.0
published: '2022-05-01'
updated: '2026-07-06'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-593c-j348-f3gv'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2008-1393'
  - url: 'https://exchange.xforce.ibmcloud.com/vulnerabilities/41427'
  - url: 'https://github.com/plone/Plone'
  - url: >-
      http://plone.org/documentation/how-to/secure-login-without-plain-text-passwords
  - url: 'http://plone.org/products/plone/roadmap/48?'
  - 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: 0.02904
epssPercentile: 0.86301
ingestedAt: '2026-07-08T18:25:45.827Z'
---

## Overview

Plone CMS before 3, places a base64 encoded form of the username and password in the `__ac` cookie for the admin account, which makes it easier for remote attackers to obtain administrative privileges by sniffing the network.

## Affected packages

- `plone < 3.0`

## Remediation

Upgrade to a patched release:

- `plone 3.0`