CVE-2009-3421
CRITICALCVSS 9.8/10EPSS 4.99%
Last modified
CVE-2009-3421 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 4.99% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Zenas | Pao-Bacheca Guestbook | 2.1 |
References
- http://secunia.com/advisories/36023Broken Link, Vendor Advisory
- http://www.exploit-db.com/exploits/9293Third Party Advisory, VDB Entry
- http://www.osvdb.org/56757Broken Link, Exploit
- https://exchange.xforce.ibmcloud.com/vulnerabilities/52100Third Party Advisory, VDB Entry
- http://secunia.com/advisories/36023Broken Link, Vendor Advisory
- http://www.exploit-db.com/exploits/9293Third Party Advisory, VDB Entry
- http://www.osvdb.org/56757Broken Link, Exploit
- https://exchange.xforce.ibmcloud.com/vulnerabilities/52100Third Party Advisory, VDB Entry
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2009-3421?
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.
How severe is CVE-2009-3421?
CVE-2009-3421 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.99% probability of exploitation in the next 30 days.
How do I fix CVE-2009-3421?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2009-3421?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST