PatchTheCVECVE-2006-6661: Variable overwrite vulnerability in blog.php in PHP-Update 2.7 and earlier allows remote attackers to overwrit
CVE-2006-6661 is a high-severity flaw (CVSS 7.5) affecting php-update. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Variable overwrite vulnerability in blog.php in PHP-Update 2.7 and earlier allows remote attackers to overwrite arbitrary program variables and execute arbitrary PHP code via multiple vectors that use the extract function, as demonstrated by the (1) f, (2) newmessage, (3) newusername, (4) adminuser, and (5) permission parameters.
Why this priority
- High severity
- EPSS top 6%: very likely to be exploited
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| EPSS exploit chance | 6.7% (top 6%) |
| CISA exploited list | No |
| Published | 2006-12-20 |
| Last modified | 2026-06-16 |
Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2006-6661?
php-update: upgrade to newer than 2.7. Exact commands for each OS are on this page.
Is CVE-2006-6661 being exploited?
CVE-2006-6661 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2006-6661 affect?
CVE-2006-6661 affects php-update. Severity is high (CVSS 7.5). Variable overwrite vulnerability in blog.php in PHP-Update 2.7 and earlier allows remote attackers to overwrite arbitrary program variables and execute arbitrary PHP code via multiple vectors that use the extract function, as demonstrated b
How urgent is CVE-2006-6661?
Priority 55/100. High severity; EPSS top 6%: very likely to be exploited; Public exploit reference
Software pages
Related CVEs
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- CVE-2006-6878 HIGH 7.5 UPGRADE admin/uploads.php in PHP-Update 2.7 and earlier allows remote attackers to gain privileges by setting the righ