CVE-2011-4540

Exp

Multiple cross-site scripting (XSS) vulnerabilities in AtMail Open (aka AtMail Open-Source edition) 1.04 allow remote attackers to inject arbitrary web script or HTML via the func parameter to (1) ldap.php or (2) search.php.

Published: 2011-12-01 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-4540 is rated High Exploit Risk (63.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 5.10%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2011-4540

EDB-ID Source Kind Published Link
36401 exploit_db edb 2011-12-01 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2011-4540

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-20 5.27% 5.10% -0.18%
2 2026-01-11 3.62% 5.27% +1.65%
3 2026-01-05 — 3.62% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-4540

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2011-4540

Affected software / configurations for CVE-2011-4540

Vendor Product Version Raw CPE
atmail atmail_open 1.04 cpe:2.3:a:atmail:atmail_open:1.04:*:open-source:*:*:*:*:*

References for CVE-2011-4540

cvelogic Threat Intelligence