Skip to content
Fencer Vulns
medium 6.8

CVE-2007-1521 json

Double free vulnerability in PHP before 4.4.7, and 5.x before 5.2.2, allows context-dependent attackers to execute arbitrary code by interr…

published 2007-03-20 19 y ago modified 2026-06-16 4 mo ago also EUVD-2007-1515

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
8.6%
EPSS 8.6% chance of exploitation in 30 days, percentile 95%
public exploits
1
Exploit-DB

Summary

Double free vulnerability in PHP before 4.4.7, and 5.x before 5.2.2, allows context-dependent attackers to execute arbitrary code by interrupting the session_regenerate_id function, as demonstrated by calling a userspace error handler or triggering a memory limit violation.

Timeline

  1. First public exploit (EDB-3479)
  2. Published

Exploit prediction

8.61% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-3479 PHP 5.2.1 - 'session_regenerate_id()' Double-Free local, 2007-03-14
  • php-security.org http://www.php-security.org/MOPB/MOPB-22-2007.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Technology feeds

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.