CVE-2007-1900

5.0 MEDIUM 3% exploit odds Fix listed

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 2.6% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2007-04-10 18:19 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 22:38 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 2.6% in the next 30 days (EPSS).
Severity: 5.0 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2007-04-10 18:19 UTC
Last modified: 2026-06-16 22:38 UTC
Exploit probability: 2.6% · EPSS, next 30 days
Record status: Modified

Affected

PHP 5.2.0
PHP 5.2.1

Attack profile CVSS 2.0 · 5.0

Attack vector: Network
Complexity: Low
Authentication: None
Confidentiality: None
Integrity: Partial
Availability: None

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2007-1900.md and follow it. Check whether this project is affected by CVE-2007-1900. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record