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CVE-2016-1000104

26
FAUCET Score

CVE-2016-1000104 is a security bypass vulnerability affecting the FcgidPassHeader Proxy in Apache mod_fcgid versions up to 2016-07-07, including various Apache and openSUSE products. With a CVSS score of 8.8 (High), this vulnerability is easily exploitable over the network with low privileges and no user interaction, potentially leading to high impact on confidentiality, integrity, and availability. There is currently no public exploit code available, nor is there evidence of active exploitation, and it has received no significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2016-07-07CPE matchmatch criteria
cpe:2.3:a:apache:mod_fcgid:*:*:*:*:*:*:*:*
42.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
13.2CPE matchmatch criteria
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.23%
Probability of exploitation in next 30 days
EPSS Percentile
80.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0223 is in the 79th percentile among its peer group of 17,822 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

microsoftpatch availablevia msrc
Product: cbl2 mod_fcgid 2.3.9-21 on CBL Mariner 2.0Fixed in: 2.3.9-21
microsoftpatch availablevia msrc
Product: 16858-16823Fixed in: 2.3.9-21
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: mod_fcgid

Vendor Advisories (2)

microsoft2019-Dec/CVE-2016-1000104Important

A security Bypass vulnerability exists in the FcgidPassHeader Proxy in mod_fcgid through 2016-07-07.

Dec 10, 2019
redhatCVE-2016-1000104Important

mod_fcgid: mod_fcgid sets environmental variable based on user supplied Proxy request header

Jul 18, 2016

References

lists.opensuse.org / opensuse-updates/2016-08/msg00084.html
Mailing ListThird Party Advisory
tenable.com / security/tns-2017-04
openwall.com / lists/oss-security/2016/07/18/6
securityfocus.com / bid/91822