CVE-2011-1756
MEDIUM · CVSS 5.0EPSS 2.7%EU EUVD
modules/xmpp/serv_xmpp.c in Citadel 7.86 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.
Key facts
- CVSS score
- 5.0 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P- Weakness (CWE)
- CWE-399
- EPSS score
- 2.7% (86th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2011-1755)
- Published
- June 21, 2011
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2011-1755 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- citadel / citadel
- citadel / citadel
- citadel / citadel
- citadel / citadel
- citadel / citadel
- citadel / citadel
- citadel / citadel
- citadel / citadel
References
- http://code.citadel.org/cgit.cgi/git.citadel.org/commit/?id=27c991cc2059f5530d3d4e9689dc976b745f5b0c(Patch)
- http://code.citadel.org/cgit.cgi/git.citadel.org/commit/?id=95040add546a705cc2d1d8f16293141f9f9845a6(Patch)
- http://packages.debian.org/changelogs/pool/main/c/citadel/citadel_7.37-8+lenny1/changelog
- http://packages.debian.org/changelogs/pool/main/c/citadel/citadel_7.83-2squeeze2/changelog
- http://secunia.com/advisories/44788(Vendor Advisory)
- http://security.debian.org/debian-security/pool/updates/main/c/citadel/citadel_7.83-2squeeze2.diff.gz(Patch)
- http://www.debian.org/security/2011/dsa-2250
- http://www.securityfocus.com/bid/48071
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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