CVE-2011-5129

Exp

Heap-based buffer overflow in XChat 2.8.9 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long response string.

Published: 2012-08-30 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-5129 is rated High Exploit Risk (62.8/100): CVSS Medium severity, with high exploitation likelihood (EPSS 7.70%, 94th percentile). 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-2011-5129

EDB-ID Source Kind Published Link
18159 exploit_db edb 2011-11-25 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-2011-5129

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 2026-06-15 31.14% 7.70% -23.44%
2 2026-05-01 30.07% 31.14% +1.07%
3 2025-10-07 — 30.07% —

Full EPSS history (18 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-5129

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2011-5129

OS Trackers for CVE-2011-5129

vendor priority summary link
redhat — — https://access.redhat.com/security/cve/CVE-2011-5129
ubuntu medium CVE-2011-5129 medium priority: Ubuntu including 2 source packages (xchat, xchat-gnome), 12 status rows across 6 suites (hardy, lucid, natty, oneiric, precise, upstream): not-affected 9, needs-triage 2, ignored 1. https://ubuntu.com/security/CVE-2011-5129

Affected software / configurations for CVE-2011-5129

Vendor Product Version Raw CPE
xchat xchat <= 2.8.9 cpe:2.3:a:xchat:xchat:*:*:*:*:*:*:*:*
xchat xchat 1.2.1 cpe:2.3:a:xchat:xchat:1.2.1:*:*:*:*:*:*:*
xchat xchat 1.3.9 cpe:2.3:a:xchat:xchat:1.3.9:*:*:*:*:*:*:*
xchat xchat 1.3.10 cpe:2.3:a:xchat:xchat:1.3.10:*:*:*:*:*:*:*
xchat xchat 1.3.11 cpe:2.3:a:xchat:xchat:1.3.11:*:*:*:*:*:*:*
xchat xchat 1.3.12 cpe:2.3:a:xchat:xchat:1.3.12:*:*:*:*:*:*:*
xchat xchat 1.3.13 cpe:2.3:a:xchat:xchat:1.3.13:*:*:*:*:*:*:*
xchat xchat 1.4 cpe:2.3:a:xchat:xchat:1.4:*:*:*:*:*:*:*
xchat xchat 1.4.1 cpe:2.3:a:xchat:xchat:1.4.1:*:*:*:*:*:*:*
xchat xchat 1.4.2 cpe:2.3:a:xchat:xchat:1.4.2:*:*:*:*:*:*:*
xchat xchat 1.4.3 cpe:2.3:a:xchat:xchat:1.4.3:*:*:*:*:*:*:*
xchat xchat 1.5.6 cpe:2.3:a:xchat:xchat:1.5.6:*:*:*:*:*:*:*
xchat xchat 1.8.0 cpe:2.3:a:xchat:xchat:1.8.0:*:*:*:*:*:*:*
xchat xchat 1.8.1 cpe:2.3:a:xchat:xchat:1.8.1:*:*:*:*:*:*:*
xchat xchat 1.8.2 cpe:2.3:a:xchat:xchat:1.8.2:*:*:*:*:*:*:*
xchat xchat 1.8.3 cpe:2.3:a:xchat:xchat:1.8.3:*:*:*:*:*:*:*
xchat xchat 1.8.4 cpe:2.3:a:xchat:xchat:1.8.4:*:*:*:*:*:*:*
xchat xchat 1.8.5 cpe:2.3:a:xchat:xchat:1.8.5:*:*:*:*:*:*:*
xchat xchat 1.8.6 cpe:2.3:a:xchat:xchat:1.8.6:*:*:*:*:*:*:*
xchat xchat 1.8.7 cpe:2.3:a:xchat:xchat:1.8.7:*:*:*:*:*:*:*
xchat xchat 1.8.8 cpe:2.3:a:xchat:xchat:1.8.8:*:*:*:*:*:*:*
xchat xchat 1.8.9 cpe:2.3:a:xchat:xchat:1.8.9:*:*:*:*:*:*:*
xchat xchat 1.9.0 cpe:2.3:a:xchat:xchat:1.9.0:*:*:*:*:*:*:*
xchat xchat 1.9.1 cpe:2.3:a:xchat:xchat:1.9.1:*:*:*:*:*:*:*
xchat xchat 1.9.2 cpe:2.3:a:xchat:xchat:1.9.2:*:*:*:*:*:*:*
xchat xchat 1.9.3 cpe:2.3:a:xchat:xchat:1.9.3:*:*:*:*:*:*:*
xchat xchat 1.9.4 cpe:2.3:a:xchat:xchat:1.9.4:*:*:*:*:*:*:*
xchat xchat 1.9.5 cpe:2.3:a:xchat:xchat:1.9.5:*:*:*:*:*:*:*
xchat xchat 1.9.6 cpe:2.3:a:xchat:xchat:1.9.6:*:*:*:*:*:*:*
xchat xchat 1.9.7 cpe:2.3:a:xchat:xchat:1.9.7:*:*:*:*:*:*:*
xchat xchat 1.9.8 cpe:2.3:a:xchat:xchat:1.9.8:*:*:*:*:*:*:*
xchat xchat 1.9.9 cpe:2.3:a:xchat:xchat:1.9.9:*:*:*:*:*:*:*
xchat xchat 2.0.0 cpe:2.3:a:xchat:xchat:2.0.0:*:*:*:*:*:*:*
xchat xchat 2.0.1 cpe:2.3:a:xchat:xchat:2.0.1:*:*:*:*:*:*:*
xchat xchat 2.0.2 cpe:2.3:a:xchat:xchat:2.0.2:*:*:*:*:*:*:*
xchat xchat 2.0.3 cpe:2.3:a:xchat:xchat:2.0.3:*:*:*:*:*:*:*
xchat xchat 2.0.4 cpe:2.3:a:xchat:xchat:2.0.4:*:*:*:*:*:*:*
xchat xchat 2.0.5 cpe:2.3:a:xchat:xchat:2.0.5:*:*:*:*:*:*:*
xchat xchat 2.0.6 cpe:2.3:a:xchat:xchat:2.0.6:*:*:*:*:*:*:*
xchat xchat 2.0.7 cpe:2.3:a:xchat:xchat:2.0.7:*:*:*:*:*:*:*
xchat xchat 2.0.8 cpe:2.3:a:xchat:xchat:2.0.8:*:*:*:*:*:*:*
xchat xchat 2.6.7 cpe:2.3:a:xchat:xchat:2.6.7:*:*:*:*:*:*:*
xchat xchat 2.8.0 cpe:2.3:a:xchat:xchat:2.8.0:*:*:*:*:*:*:*
xchat xchat 2.8.1 cpe:2.3:a:xchat:xchat:2.8.1:*:*:*:*:*:*:*
xchat xchat 2.8.3 cpe:2.3:a:xchat:xchat:2.8.3:*:*:*:*:*:*:*
xchat xchat 2.8.3 cpe:2.3:a:xchat:xchat:2.8.3:c:*:*:*:*:*:*
xchat xchat 2.8.3 cpe:2.3:a:xchat:xchat:2.8.3:e:*:*:*:*:*:*
xchat xchat 2.8.4 cpe:2.3:a:xchat:xchat:2.8.4:*:*:*:*:*:*:*
xchat xchat 2.8.5 cpe:2.3:a:xchat:xchat:2.8.5:b:*:*:*:*:*:*
xchat xchat 2.8.5 cpe:2.3:a:xchat:xchat:2.8.5:e:*:*:*:*:*:*
xchat xchat 2.8.6 cpe:2.3:a:xchat:xchat:2.8.6:*:*:*:*:*:*:*
xchat xchat 2.8.7 cpe:2.3:a:xchat:xchat:2.8.7:a:*:*:*:*:*:*
xchat xchat 2.8.7 cpe:2.3:a:xchat:xchat:2.8.7:b:*:*:*:*:*:*
xchat xchat 2.8.7 cpe:2.3:a:xchat:xchat:2.8.7:c:*:*:*:*:*:*
xchat xchat 2.8.7 cpe:2.3:a:xchat:xchat:2.8.7:d:*:*:*:*:*:*
xchat xchat 2.8.7 cpe:2.3:a:xchat:xchat:2.8.7:e:*:*:*:*:*:*
xchat xchat 2.8.7 cpe:2.3:a:xchat:xchat:2.8.7:f:*:*:*:*:*:*
xchat xchat 2.8.7b cpe:2.3:a:xchat:xchat:2.8.7b:*:*:*:*:*:*:*
xchat xchat 2.8.8 cpe:2.3:a:xchat:xchat:2.8.8:*:*:*:*:*:*:*

References for CVE-2011-5129

cvelogic Threat Intelligence