CVE-2004-1020
The addslashes function in PHP 4.3.9 does not properly escape a NULL (/0) character, which may allow remote attackers to read arbitrary…
- 5.0MediumCVSS base score
- 7.1%Exploitation in 30 daysEPSS · top 5.7% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 1Public exploitsMetasploit, Nuclei and Exploit-DB
Description
The addslashes function in PHP 4.3.9 does not properly escape a NULL (/0) character, which may allow remote attackers to read arbitrary files in PHP applications that contain a directory traversal vulnerability in require or include statements, but are otherwise protected by the magic_quotes_gpc mechanism. NOTE: this issue was originally REJECTed by its CNA before publication, but that decision is in active dispute. This candidate may change significantly in the future as a result of further discussion.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list an Exploit-DB entry for it.
Show the exploits1
Exploit-DB1 entry
- PHP 4/5 - 'addslashes()' Null Byte Bypass (Exploit-DB entry) (opens in a new tab)
EDB-ID 24985remote, phppublished 16 Dec 2004Verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
- 34 days later
· 34 days later
Published
- 20 years later
· 20 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
- EPSS (exploitation in 30 days)
- 7.1% · top 5.7% of all CVEs (9 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.
Affected products
n/a
- affected n/a
References
8
- php-addslashes-view-files(18516) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- http://www.php.net/release_4_3_10.php (opens in a new tab)x_refsource_CONFIRMx_transferred
- MDKSA-2004:151 (opens in a new tab)vendor-advisoryx_refsource_MANDRAKEx_transferred
- 11981 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 20041216 PHP Input Validation Vulnerabilities (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- CLA-2005:915 (opens in a new tab)vendor-advisoryx_refsource_CONECTIVAx_transferred
- GLSA-200412-14 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- HPSBMA01212 (opens in a new tab)vendor-advisoryx_refsource_HPx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2004-1018 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2004-1020)Record last updated .