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CVE-2018-5478

20
FAUCET Score

CVE-2018-5478 describes a cross-site scripting (XSS) vulnerability affecting Contao 3.x versions prior to 3.5.32, specifically within the unsubscribe module of the frontend newsletter extension. Rated as MEDIUM severity with a CVSS score of 6.1, this vulnerability can be exploited remotely with low attack complexity, requiring user interaction to achieve partial impact on confidentiality and integrity. 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, < 3.5.32CPE matchmatch criteria
cpe:2.3:a:contao:contao:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.41%
Probability of exploitation in next 30 days
EPSS Percentile
33.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0041 is in the 35th percentile among its peer group of 26,221 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 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

composerpatch availablevia ghsa
Product: contao/coreFixed in: 3.5.32

Vendor Advisories (1)

composerGHSA-mpg7-2rx9-h5qpmedium

Contao Cross-site Scripting vulnerabililty

Sep 21, 2023

References

github.com / FriendsOfPHP/security-advisories/blob/master/contao/core/CVE-2018-5478.yaml
Third Party Advisory
security.snyk.io / vuln/SNYK-PHP-CONTAOCORE-70397
Third Party Advisory