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Fencer Vulns
medium 5.0

CVE-2009-1902 json

The multipart processor in ModSecurity before 2.5.9 allows remote attackers to cause a denial of service (crash) via a multipart form datap…

published 2009-06-03 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-1897

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
13.7%
EPSS 13.7% chance of exploitation in 30 days, percentile 96%
public exploits
1
Exploit-DB

Summary

The multipart processor in ModSecurity before 2.5.9 allows remote attackers to cause a denial of service (crash) via a multipart form datapost request with a missing part header name, which triggers a NULL pointer dereference.

Patch / fix

  • trustwave modsecurity 2.5.9

Timeline

  1. First public exploit (EDB-8241)
  2. Published

Exploit prediction

13.73% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-8241 ModSecurity < 2.5.9 - Remote Denial of Service dos, 2009-03-19
  • securityfocus.com http://www.securityfocus.com/archive/1/501968 referenced PoC, tagged "exploit" by a source, unverified
  • securityfocus.com http://www.securityfocus.com/bid/34096 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.