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High

Plone CMS Improper Session Management

  • Disclosed: 01.05.2022
  • Updated: 11.10.2026 13:17

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.

Affected software

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PlatformPackageVulnerable versionsFixed in
Python (PyPI) plone < 3.0 3.0

References

CVSS score -
Weakness (CWE)
-
Platform
Python (PyPI)
Package
plone
Disclosed
01.05.2022
Updated
11.10.2026 13:17

Sources and licenses

OSV / GitHub Advisory Database - PYSEC-2026-734 - PyPA Advisory Database; CC BY 4.0

OSV / GitHub Advisory Database - GHSA-mq3q-jjph-rp5p - CC BY 4.0

Vulnerability history: plone

All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (101) in the archive
Total entries
101
First → latest
09.2006 03.2024
Without a fix
10
Exploited in attacks
0

Severity breakdown

  • Critical 5
  • High 36
  • Medium 58
  • Low 2

Disclosures per year

earlier: 52

Severity:
  1. Cross-Frame Scripting vulnerability has been found on Plone CMS
    High · 7.1 CVE-2024-0669 < 6.0.7 6.0.7
  2. Server-Side Request Forgery in Plone CMS
    High · 8.8 CVE-2021-33926 >= 4.3, < 5.2.5 5.2.5
  3. Plone anonymous access to sub-objects in CMFEditions where KwAsAttributes classes were publishable
    High CVE-2011-4030 >= 4.0, < 4.0.10, >= 4.1, < 4.1.1, >= 4.2a1, < 4.2a3 4.0.10, 4.1.1, 4.2a3
  4. Plone Improper Session Management
    High CVE-2008-1393 < 3.0 3.0
  5. Plone CMS Improper Session Management this entry
    High CVE-2008-1394 < 3.0 3.0
  6. Server-Side Request Forgery in Plone
    High · 7.5 CVE-2021-33511 <= 5.2.4 no fix
  7. Incorrect Permission Assignment for Critical Resource in Plone
    Critical · 9.9 CVE-2021-33509 < 5.2.5 5.2.5
  8. Improper Restriction of XML External Entity Reference in Plone
    High · 8.8 CVE-2020-28736 < 5.2.3 5.2.3
  9. SSRF attacks via tracebacks in Plone
    High · 8.8 CVE-2020-28735 < 5.2.3 5.2.3
  10. Improper Restriction of XML External Entity Reference in Plone
    High · 8.8 CVE-2020-28734 < 5.2.3 5.2.3
  11. Plone Privilege Escallation
    High · 8.8 CVE-2020-7938 >= 5.2.0, < 5.2.2 5.2.2
  12. Plone Unauthenticated Write Vulnerability
    Critical · 9.8 CVE-2020-7941 >= 4.3, <= 5.2.1 no fix
  13. SQL Injection in DTML or in connection objects in Plone 4.0 through 5.2.1 allows users to perform unwanted SQL queries. (This is a problem in Zope.)
    High · 8.8 CVE-2020-7939 >= 4.0, < 5.2.2 5.2.2
  14. Missing password strength checks on some forms in Plone 4.3 through 5.2.0 allow users to set weak passwords, leading to easier cracking.
    High · 7.5 CVE-2020-7940 >= 4.3, < 5.2.1 5.2.1
  15. Accessing private content via str.format in through-the-web templates and scripts in Plone 2.5-5.1rc1. This improves an earlier hotfix. Since the format method was introduced in Python 2.6, this part
    High · 6.5 CVE-2017-1000483 >= 2.5, < 4.3.16, >= 5, < 5.1.0 4.3.16, 5.1.0
  16. Multiple cross-site request forgery (CSRF) vulnerabilities in Zope Management Interface 4.3.7 and earlier, and Plone before 5.x.
    High · 8.8 CVE-2015-7293 < 5.0a1 5.0a1
  17. Plone 3.3.0 through 3.3.6 allows remote attackers to inject headers into HTTP responses.
    High · 7.5 CVE-2015-7318 >= 3.3, < 4.0a1 4.0a1
  18. Plone and Zope2 do not reseed pseudo-random number generator
    High · 7.5 CVE-2012-6661 >= 3.2.2, < 4.2.3, >= 4.3a1, < 4.3b1 4.2.3, 4.3b1
  19. at_download.py in Plone before 4.2.3 and 4.3 before beta 1 allows remote attackers to read arbitrary BLOBs (Files and Images) stored on custom content types via a crafted URL.
    High · 7.5 CVE-2012-5501 < 4.2.3, >= 4.3a0, < 4.3b1 4.2.3, 4.3b1
  20. python_scripts.py in Plone before 4.2.3 and 4.3 before beta 1 allows remote attackers to cause a denial of service (memory consumption) via a large value, related to formatColumns.
    High · 7.5 CVE-2012-5499 < 4.2.3, >= 4.3a0, < 4.3b1 4.2.3, 4.3b1
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