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Vulnerability record · CVE-2013-5705 · published 15 April 2014

CVE-2013-5705: Trustwave modsecurity vulnerability

Trustwave · Modsecurity

apache2/modsecurity.c in ModSecurity before 2.7.6 allows remote attackers to bypass rules by using chunked transfer coding with a capitalized Chunked value in the Transfer-Encoding HTTP header.

5.0 CVSS 2.0 Medium EPSS 2.7% · top 14.8%
5.0CVSS 2.0 base score
2.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References, 2 tagged exploit
16 Jun 2026Last modified by NVD

Description

apache2/modsecurity.c in ModSecurity before 2.7.6 allows remote attackers to bypass rules by using chunked transfer coding with a capitalized Chunked value in the Transfer-Encoding HTTP header.

AV:N/AC:L/Au:N/C:N/I:P/A:N

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://martin.swende.se/blog/HTTPChunked.html ExploitThird Party Advisory
http://www.debian.org/security/2014/dsa-2991 Third Party Advisory
https://github.com/SpiderLabs/ModSecurity/commit/f8d441cd25172fdfe5b613442fedfc0da3cc333d PatchThird Party Advisory
http://martin.swende.se/blog/HTTPChunked.html ExploitThird Party Advisory
http://www.debian.org/security/2014/dsa-2991 Third Party Advisory
https://github.com/SpiderLabs/ModSecurity/commit/f8d441cd25172fdfe5b613442fedfc0da3cc333d PatchThird Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2013-5705), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.