CVE-2009-3421
login.php in Zenas PaoBacheca Guestbook 2.1, when register_globals is enabled, allows remote...
CVE-2009-3421 is a critical vulnerability (CVSS 9.8) in Zenas Pao-bacheca Guestbook, published September 25, 2009. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 4.99%, the 92nd percentile. No source names a fixed version.
- Severity
- 9.8 CriticalCVSS 3.1, NVD
- Exploit chance
- 4.99%EPSS, 92nd percentile
- Exploitation
- None known1 public exploit
- Fixed in
- No fix listedNo source names one
Description
login.php in Zenas PaoBacheca Guestbook 2.1, when register_globals is enabled, allows remote attackers to bypass authentication and gain administrative access by setting the login_ok parameter to 1.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | PaoBacheca Guestbook 2.1 - 'login_ok' Authentication Bypass | 2009-07-28 |
What each source reports
NVD Score used
login.php in Zenas PaoBacheca Guestbook 2.1, when register_globals is enabled, allows remote attackers to bypass authentication and gain administrative access by setting the login_ok parameter to 1.
- Record
CVE-2009-3421- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-287
- Updated
- 2026-11-02
CVE ListNo score
login.php in Zenas PaoBacheca Guestbook 2.1, when register_globals is enabled, allows remote attackers to bypass authentication and gain administrative access by setting the login_ok parameter to 1.
- Record
CVE-2009-3421- Updated
- 2026-11-02
EUVDEUVD-2009-3403No score
login.php in Zenas PaoBacheca Guestbook 2.1, when register_globals is enabled, allows remote attackers to bypass authentication and gain administrative access by setting the login_ok parameter to 1.
- Record
EUVD-2009-3403- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-9x4q-26cx-fr52
login.php in Zenas PaoBacheca Guestbook 2.1, when register_globals is enabled, allows remote...
login.php in Zenas PaoBacheca Guestbook 2.1, when register_globals is enabled, allows remote attackers to bypass authentication and gain administrative access by setting the login_ok parameter to 1.
- Record
GHSA-9x4q-26cx-fr52- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-287
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.