Skip to content
Fencer Intel
high 7.5

CVE-2012-5223 in the critical feed json

The proc_deutf function in includes/functions_vbseocp_abstract.php in vBSEO 3.5.0, 3.5.1, 3.5.2, 3.6.0, and earlier allows remote attackers…

published 2012-10-01 14 y ago modified 2026-06-16 4 mo ago also EUVD-2012-5146

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
40.5%
EPSS 40.5% chance of exploitation in 30 days, percentile 98%
public exploits
2
Metasploit, Exploit-DB

Summary

The proc_deutf function in includes/functions_vbseocp_abstract.php in vBSEO 3.5.0, 3.5.1, 3.5.2, 3.6.0, and earlier allows remote attackers to insert and execute arbitrary PHP code via "complex curly syntax" in the char_repl parameter, which is inserted into a regular expression that is processed by the preg_replace function with the eval switch.

Patch / fix

Timeline

  1. First public exploit (Metasploit exploit/multi/http/vbseo_proc_deutf)
  2. Published

Exploit prediction

40.53% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • Metasploit exploit/multi/http/vbseo_proc_deutf vBSEO proc_deutf() Remote PHP Code Injection metasploit exploit, excellent rank, 2012-01-23
  • EDB-18424 vBSEO 3.6.0 - 'proc_deutf()' Remote PHP Code Injection (Metasploit) webapps, 2012-01-27
  • vbseo.com http://www.vbseo.com/f5/vbseo-security-bulletin-all-supported-versions-patch-release-52783/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-94 Improper Control of Generation of Code

References

Sources

Fencer Intel 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.