Stored cross site scripting on API integration

published 2023-04-28 3 y ago modified 2026-09-10 1 mo ago also GHSA-xfmj-r86m-j2hr , EUVD-2023-1425

cvss: 5.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits: 0; none known

Concrete CMS (previously concrete5) versions 8.5.12 and below, and 9.0 through 9.1.3 is vulnerable to stored XSS on API Integrations via the name parameter.

Patch / fix

fixed in 2 links 1

packagist concrete5/concrete5 9.2.0
concretecms concrete_cms 9.2.0

github.com/concretecms/concretecms@546cef6 commit

Exploit prediction

0.58% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.5	CVSS:3.1/AC:L/AV:N/A:N/C:H/I:L/PR:H/S:U/UI:N
CNA	3.1	5.5	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N
NVD	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
GitHub	3.1	5.5	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	concrete5/concrete5	<9.2.0	9.2.0

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation

References

github.com /concretecms/concretecms/commit/546cef6ec29208d5c079113635cd6e6b250e9f7c
web
concretecms.org /about/project-news/security/concrete-cms-security-advisory-2023-04-20
web, vendor-advisory
concretecms.com
web, product
concretecms.org /about/project-news/security/2023-11-09-security-blog-about-updated-cves-and-new-release
web
nvd.nist.gov /vuln/detail/CVE-2023-28477
advisory
github.com /concretecms/concretecms
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary