SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2005-1820

zboard.php in Zeroboard version 4.1pl2 to 4.1pl5 allows remote attackers to execute arbitrary PHP code via improper quoting when using the preg_replace function.

EXPLOIT ✓HIGH 7.5EPSS 2.66%

Does this matter?

A public exploit is published in Exploit-DB (verified) and the impact is high, while EPSS rates exploitation at 2.7%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use.

Description

zboard.php in Zeroboard version 4.1pl2 to 4.1pl5 allows remote attackers to execute arbitrary PHP code via improper quoting when using the preg_replace function.

CVSS 2.0
7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS
2.66% probability · 86th percentile
Public exploits
1 in Exploit-DB · verified · first 31 May 2005
CISA KEV
Not listed
Affected
zeroboard/zeroboard
Source
cve@mitre.org
EPSS trend
0%3%5%26 October 2026: 2.66%26 October 202626 October 2026

EPSS 2.7% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Public exploits (1)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-IDTitleTypePublishedVerified
EDB-1020source ↗ZeroBoard 4.1 - 'preg_replace' Remote Nobody Shellphp · n0gadawebapps31 May 2005yes

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.