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Fencer Intel
medium 5.0

CVE-2002-1783 json

CRLF injection vulnerability in PHP 4.2.1 through 4.2.3, when allow_url_fopen is enabled, allows remote attackers to modify HTTP headers fo…

published 23y ago modified 4mo ago also EUVD-2002-1762

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
16.7%
EPSS 16.7% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

CRLF injection vulnerability in PHP 4.2.1 through 4.2.3, when allow_url_fopen is enabled, allows remote attackers to modify HTTP headers for outgoing requests by causing CRLF sequences to be injected into arguments that are passed to the (1) fopen or (2) file functions.

Patch / fix

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Exploit prediction

16.74% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-14).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Classification

Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.