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Fencer Vulns
critical 10.0

CVE-2008-1393 json

Plone Improper Session Management

published 2008-03-20 18 y ago modified 2026-07-06 4 mo ago also GHSA-593c-j348-f3gv , PYSEC-2026-731 , EUVD-2022-2540

cvss
10.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

Plone CMS 3.0.5, and probably other 3.x versions, 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.

Patch / fix

  • pypi plone 3.0

Exploit prediction

2.90% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • plone.org http://plone.org/documentation/how-to/secure-login-without-plain-text-passwords referenced PoC, tagged "exploit" by a source, unverified
  • plone.org http://plone.org/products/plone/roadmap/48? referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected packages

ecosystem package affected fixed in
pypi plone
<3.0
3.0

Classification

Weakness
  • CWE-255 Credentials Management Errors

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.