CVE-2004-0595PHP Vulnerability
The strip_tags function in PHP 4.x up to 4.3.7, and 5.x up to 5.0.0RC3, does not filter null (\0) characters within tag names when restricting input to allowed tags, which allows dangerous tags to be processed by web browsers such as Internet Explorer and Safari, which ignore…
Published Jul 14, 2004 · Updated Mar 9, 2026
Key Facts
Routine patching- CVE-2004-0595 is a medium-severity vulnerability (CVSS 6.8 v2) affecting Integrated Management (Avaya), PHP, Converged Communications Server (Avaya) and 7 more products.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 45% probability of exploitation in the next 30 days.
- Fixed versions are available, including PHP 0:4.3.2-11.1.ent, php3 3:3.0.18-23.1woody2, php4 4.1.2-7.
- Brandefense priority: routine patching, as no exploitation is known and its severity is moderate or low.
Scores
CVSS v2
6.8
AV:N/AC:M/Au:N/C:P/I:P/A:P
EPSS (30-day exploit likelihood)
45%
Higher than 98.7% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
40/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
- advisoryRHSA-2004:392
- advisoryRHSA-2004:395
- advisoryRHSA-2004:405
- advisoryRHSA-2005:816
- patchDSA-531
- patch10724
Description
The strip_tags function in PHP 4.x up to 4.3.7, and 5.x up to 5.0.0RC3, does not filter null (\0) characters within tag names when restricting input to allowed tags, which allows dangerous tags to be processed by web browsers such as Internet Explorer and Safari, which ignore null characters and facilitate the exploitation of cross-site scripting (XSS) vulnerabilities.
Affected Products
41 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Integrated ManagementAvaya | See advisory | n/a |
| PHPPHP | 4.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.5, 4.0.6, 4.0.7 | 0:4.3.2-11.1.ent |
| Converged Communications ServerAvaya | 2.0 | n/a |
| S8300Avaya | r2.0.0, r2.0.1 | n/a |
| S8500Avaya | r2.0.0, r2.0.1 | n/a |
Patched Releases
PHP
0:4.3.2-11.1.ent
php3
3:3.0.18-23.1woody2
php4
4.1.2-7
Timeline
Publicly disclosed
Jul 14, 2004
Last updated
Mar 9, 2026
References
- advisoryRHSA-2004:392
- advisoryRHSA-2004:395
- advisoryRHSA-2004:405
- advisoryRHSA-2005:816
- patchDSA-531
FAQ
Common Questions.
The strip_tags function in PHP 4.x up to 4.3.7, and 5.x up to 5.0.0RC3, does not filter null (\0) characters within tag names when restricting input to allowed tags, which allows dangerous tags to be processed by web browsers such as Internet Explorer and Safari, which ignore null characters and facilitate the exploit…
Affected: Integrated Management (Avaya); PHP versions 4.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.5, 4.0.6, 4.0.7; Converged Communications Server (Avaya) versions 2.0, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including PHP 0:4.3.2-11.1.ent, php3 3:3.0.18-23.1woody2, php4 4.1.2-7.
Brandefense priority: routine patching, as no exploitation is known and its severity is moderate or low.
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