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CVE-2006-0631

15
FAUCET Score

CVE-2006-0631 describes a CRLF injection vulnerability in Erik C. Thauvin's mailback.pl script. This flaw allows remote attackers to manipulate mail headers, including recipient addresses, by injecting newline characters into the Subject field, effectively turning the script into a "spam proxy." With a CVSS score of 5.0 (AV:N/AC:L/Au:N/C:N/I:P/A:N), it is a medium-severity vulnerability that can be exploited remotely with low attack complexity, leading to integrity compromise but no confidentiality or availability impact. There is no evidence of active exploitation, and no public exploit code or Metasploit/Nuclei modules are available. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:erik_c._thauvin:mailback:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:P/A:N

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.62%
Probability of exploitation in next 30 days
EPSS Percentile
73.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0162 is in the 58th percentile among its peer group of 23,723 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

seclists.org / lists/bugtraq/2006/Feb/0094.html
seclists.org / lists/bugtraq/2006/Feb/0154.html
Exploit
secunia.com / advisories/18748
PatchVendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/24540
vc.thauvin.net / cvs/cgi/mailback/mailback.pl
osvdb.org / 22955
Patch
vupen.com / english/advisories/2006/0459