How severe is CVE-2009-2473?

CVE-2009-2473 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2009-2473 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-2473?

CVE-2009-2473 affects Webdav Neon. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2009-2473?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-2473 published?

CVE-2009-2473 was published on 2009-08-21 and last updated on 2026-06-16.

CVE-2009-2473

CVE-2009-2473 is a medium-severity vulnerability in Webdav Neon with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Webdav Neon
Published: 2009-08-21
Last modified: 2026-06-16

Description

neon before 0.28.6, when expat is used, does not properly detect recursion during entity expansion, which allows context-dependent 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.

Frequently asked questions

What is CVE-2009-2473?: neon before 0.28.6, when expat is used, does not properly detect recursion during entity expansion, which allows context-dependent 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.
How severe is CVE-2009-2473?: CVE-2009-2473 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2009-2473 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-2473?: CVE-2009-2473 affects Webdav Neon. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2009-2473?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-2473 published?: CVE-2009-2473 was published on 2009-08-21 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:webdav:neon:0.28.6:*:*:*:*:*:*:*

More vulnerabilities in Webdav Neon

CVE-2004-0398 — High (CVSS 7.5): Heap-based buffer overflow in the ne_rfc1036_parse date parsing function for the neon library (libneon) 0.24.5 and…
CVE-2004-0179 — Medium (CVSS 6.8): Multiple format string vulnerabilities in (1) neon 0.24.4 and earlier, and other products that use neon including (2)…
CVE-2009-2474 — Medium (CVSS 5.8): neon before 0.28.6, when OpenSSL or GnuTLS is used, does not properly handle a '\0' character in a domain name in the…
CVE-2008-3746 — Medium (CVSS 4.3): neon 0.28.0 through 0.28.2 allows remote servers to cause a denial of service (NULL pointer dereference and crash) via…

All CVEs affecting Webdav Neon →

Other CWE-399 (Resource Management Errors) vulnerabilities

CVE-2015-8104 — Critical (CVSS 10.0): The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a…
CVE-2015-0339 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0335 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2015-0333 — Critical (CVSS 10.0): Adobe Flash Player before 13.0.0.277 and 14.x through 17.x before 17.0.0.134 on Windows and OS X and before…
CVE-2014-4121 — Critical (CVSS 10.0): Microsoft .NET Framework 2.0 SP2, 3.5, 3.5.1, 4, 4.5, 4.5.1, and 4.5.2 does not properly parse internationalized…
CVE-2014-0560 — Critical (CVSS 10.0): Use-after-free vulnerability in Adobe Reader and Acrobat 10.x before 10.1.12 and 11.x before 11.0.09 on Windows and OS…

Browse all CWE-399 (Resource Management Errors) vulnerabilities →