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CVE-2018-20028

23
FAUCET Score

CVE-2018-20028 describes an Incorrect Access Control vulnerability affecting Contao CMS versions 3.x prior to 3.5.37, 4.4.x prior to 4.4.31, and 4.6.x prior to 4.6.11. With a CVSS score of 6.5 (Medium), this vulnerability can be exploited remotely with low attack complexity and requires low privileges, potentially leading to high confidentiality impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0.0, < 3.5.37CPE matchmatch criteria
cpe:2.3:a:contao:contao_cms:*:*:*:*:*:*:*:*
>= 4.4.0, < 4.4.31CPE matchmatch criteria
cpe:2.3:a:contao:contao_cms:*:*:*:*:*:*:*:*
>= 4.6.0, < 4.6.11CPE matchmatch criteria
cpe:2.3:a:contao:contao_cms:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.92%
Probability of exploitation in next 30 days
EPSS Percentile
56.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0092 is in the 69th percentile among its peer group of 21,977 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (3)

composerpatch availablevia ghsa
Product: contao/contaoFixed in: 3.5.37
composerpatch availablevia ghsa
Product: contao/contaoFixed in: 4.6.11
composerpatch availablevia ghsa
Product: contao/contaoFixed in: 4.4.31

Vendor Advisories (1)

composerGHSA-q99w-j4mj-7hj8medium

Contao Information Disclosure via Access Control Flaws

May 13, 2022

References

contao.org / en/news.html
Vendor Advisory
contao.org / en/news/security-vulnerability-cve-2018-20028.html
Vendor Advisory