—

PYSEC-2026-734

Plone CMS Improper Session Management

Quick fix

PYSEC-2026-734 — plone: upgrade to the fixed version with the command below.

pip install --upgrade 'plone>=3.0'

Details

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

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/plone

Introduced in: 0Fixed in: 3.0

Fixpip install --upgrade 'plone>=3.0'

References

https://nvd.nist.gov/vuln/detail/CVE-2008-1394[ADVISORY]
https://exchange.xforce.ibmcloud.com/vulnerabilities/41425[WEB]
https://github.com/plone/Plone[PACKAGE]
http://plone.org/about/security/overview/security-overview-of-plone[WEB]
http://securityreason.com/securityalert/3754[WEB]
http://www.procheckup.com/Hacking_Plone_CMS.pdf[WEB]
http://www.securityfocus.com/archive/1/489544/100/0/threaded[WEB]
https://pypi.org/project/plone[PACKAGE]
https://github.com/advisories/GHSA-mq3q-jjph-rp5p[ADVISORY]