CVE-2012-5223Vbseo Code Injection
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…
Published Oct 1, 2012 · Updated Apr 28, 2026
Key Facts
Patch immediately- CVE-2012-5223 is a high-severity vulnerability (CVSS 7.5 v2) affecting Vbseo (Crawlability).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 41% probability of exploitation in the next 30 days.
- Fixed versions are available, including Vbseo 3.6.0.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v2
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS (30-day exploit likelihood)
41%
Higher than 98.6% of all scored CVEs
Exploit maturity
Weaponized
ATLAS score
55/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Weaponized
Public exploit code
3
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
Description
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.
Affected Products
35 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| VbseoCrawlability | 2.0.0, 2.1.0, 2.1.1, 2.2.0, 2.3.0, 2.4.0, 2.4.5, 3.0.0 | 3.6.0 |
Patched Releases
Vbseo
3.6.0
Timeline
Publicly disclosed
Oct 1, 2012
Last updated
Apr 28, 2026
Weakness Type
- CWE-94 Improper Control of Generation of Code ('Code Injection')
References
- advisory47699
- patchvbseo.com · vbseo-security-bulletin-all-supported-versions-…
- exploitMSF vbseo_proc_deutf.rb
- exploitExploitDB-18424
- exploit18424
FAQ
Common Questions.
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 f…
Affected: Vbseo (Crawlability) versions 2.0.0, 2.1.0, 2.1.1, 2.2.0, 2.3.0, 2.4.0, 2.4.5, 3.0.0. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Vbseo 3.6.0.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Is CVE-2012-5223 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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