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Fencer Vulns
medium 6.4

CVE-2008-6736 json

Flat Calendar 1.1 does not properly restrict access to administrative functions, which allows remote attackers to (1) add new events via ca…

published 2009-04-21 17 y ago modified 2026-06-16 4 mo ago also EUVD-2008-6696

cvss
6.4
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
1
Exploit-DB

Summary

Flat Calendar 1.1 does not properly restrict access to administrative functions, which allows remote attackers to (1) add new events via calAdd.php, as reachable from admin/add.php, or (2) delete events via admin/deleteEvent.php. NOTE: this is only a vulnerability when the administrator does not follow recommendations in the product's security documentation.

Timeline

  1. First public exploit (EDB-31908)
  2. Published

Exploit prediction

2.20% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-31908 Flat Calendar 1.1 - Multiple Administrative Scripts Authentication Bypass Vulnerabilities webapps, 2008-06-11
  • securityfocus.com http://www.securityfocus.com/bid/29662 referenced PoC, tagged "exploit" by a source, unverified
  • osvdb.org http://osvdb.org/51506 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 6.4 AV:N/AC:L/Au:N/C:N/I:P/A:P

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls

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.