CVE-2011-1757

DJabberd 0.84 and earlier does not properly detect recursion during entity expansion, which allows remote attackers to cause a denial of service (memory and CPU consumption) via a crafted XML document containing a large number of nested entity references, a similar issue to CVE-2003-1564.

Published: 2011-06-21 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-1757 is rated Moderate Risk (42.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.47%). Review affected assets and schedule remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2011-1757

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 2025-03-17 0.28% 0.47% +0.19%
2 2024-09-17 0.19% 0.28% +0.09%
3 2024-02-08 — 0.19% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1757

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-2011-1757

Affected software / configurations for CVE-2011-1757

Vendor Product Version Raw CPE
brad_fitzpatrick djabberd <= 0.84 cpe:2.3:a:brad_fitzpatrick:djabberd:*:*:*:*:*:*:*:*
brad_fitzpatrick djabberd 0.80 cpe:2.3:a:brad_fitzpatrick:djabberd:0.80:*:*:*:*:*:*:*
brad_fitzpatrick djabberd 0.81 cpe:2.3:a:brad_fitzpatrick:djabberd:0.81:*:*:*:*:*:*:*
brad_fitzpatrick djabberd 0.82 cpe:2.3:a:brad_fitzpatrick:djabberd:0.82:*:*:*:*:*:*:*
brad_fitzpatrick djabberd 0.83 cpe:2.3:a:brad_fitzpatrick:djabberd:0.83:*:*:*:*:*:*:*

References for CVE-2011-1757

cvelogic Threat Intelligence