CVE-2022-48279

In ModSecurity before 2.9.6 and 3.x before 3.0.8, HTTP multipart requests were incorrectly parsed and could bypass the Web Application Firewall. NOTE: this is related to CVE-2022-39956 but can be considered independent changes to the ModSecurity (C language) codebase.

Published: 2023-01-20 Last update: 2025-07-03 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-48279 is rated Moderate Risk (52.3/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.17%). 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-2022-48279

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 2026-06-15 0.94% 1.17% +0.23%
2 2026-05-23 0.61% 0.94% +0.33%
3 2026-01-27 — 0.61% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-48279

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2022-48279

OS Trackers for CVE-2022-48279

vendor priority summary link
debian not yet assigned CVE-2022-48279 not yet assigned priority: Debian including 2 source packages (modsecurity, modsecurity-apache), 10 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 9, open 1. https://security-tracker.debian.org/tracker/CVE-2022-48279
redhat medium — https://access.redhat.com/security/cve/CVE-2022-48279
suse high — https://www.suse.com/security/cve/CVE-2022-48279/
ubuntu medium CVE-2022-48279 medium priority: Ubuntu including 2 source packages (modsecurity, modsecurity-apache), 26 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 12, released 7, ignored 4, needs-triage 2, DNE 1. https://ubuntu.com/security/CVE-2022-48279

Affected software / configurations for CVE-2022-48279

Vendor Product Version Raw CPE
owasp modsecurity >= 3.0.0, < 3.0.8 cpe:2.3:a:owasp:modsecurity:*:*:*:*:*:*:*:*
trustwave modsecurity < 2.9.6 cpe:2.3:a:trustwave:modsecurity:*:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

References for CVE-2022-48279

URL Tags
https://coreruleset.org/20220919/crs-version-3-3-3-and-3-2-2-covering-several-cves/ Not Applicable
https://github.com/SpiderLabs/ModSecurity/pull/2795 Patch Third Party Advisory
https://github.com/SpiderLabs/ModSecurity/pull/2797 Patch Third Party Advisory
https://github.com/SpiderLabs/ModSecurity/releases/tag/v2.9.6 Release Notes Third Party Advisory
https://github.com/SpiderLabs/ModSecurity/releases/tag/v3.0.8 Release Notes Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/01/msg00023.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/52TGCZCOHYBDCVWJYNN2PS4QLOHCXWTQ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SYRTXTOQQI6SB2TLI5QXU76DURSLS4XI/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WCH6JM4I4MD4YABYFHSBDDOUFDGIFJKL/
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