CVE-2011-0526

Exp

Cross-site scripting (XSS) vulnerability in index.php in Vanilla Forums before 2.0.17 allows remote attackers to inject arbitrary web script or HTML via the Target parameter in a /entry/signin action.

Published: 2011-02-08 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-0526 is rated Exploit Available (54.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.52%). 4 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-2011-0526

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2011-0526

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 2025-03-30 0.43% 0.52% +0.09%
2 2025-03-29 0.52% 0.43% -0.09%
3 2025-03-17 — 0.52% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-0526

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-2011-0526

Affected software / configurations for CVE-2011-0526

Vendor Product Version Raw CPE
vanillaforums vanilla <= 2.0.16 cpe:2.3:a:vanillaforums:vanilla:*:*:*:*:*:*:*:*
vanillaforums vanilla 2.0.9 cpe:2.3:a:vanillaforums:vanilla:2.0.9:*:*:*:*:*:*:*
vanillaforums vanilla 2.0.10 cpe:2.3:a:vanillaforums:vanilla:2.0.10:*:*:*:*:*:*:*
vanillaforums vanilla 2.0.11 cpe:2.3:a:vanillaforums:vanilla:2.0.11:*:*:*:*:*:*:*
vanillaforums vanilla 2.0.12 cpe:2.3:a:vanillaforums:vanilla:2.0.12:*:*:*:*:*:*:*
vanillaforums vanilla 2.0.13 cpe:2.3:a:vanillaforums:vanilla:2.0.13:*:*:*:*:*:*:*
vanillaforums vanilla 2.0.14 cpe:2.3:a:vanillaforums:vanilla:2.0.14:*:*:*:*:*:*:*
vanillaforums vanilla 2.0.15 cpe:2.3:a:vanillaforums:vanilla:2.0.15:*:*:*:*:*:*:*

References for CVE-2011-0526

cvelogic Threat Intelligence