CVE-2023-28476
Stored cross site scripting on tags
Concrete CMS (previously concrete5) in versions 9.0 through 9.1.3 is vulnerable to Stored XSS on Tags on uploaded files.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
Concrete CMS (previously concrete5) in versions 9.0 through 9.1.3 is vulnerable to Stored XSS on Tags on uploaded files.
- Record
CVE-2023-28476- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
CVE List No score
Concrete CMS (previously concrete5) in versions 9.0 through 9.1.3 is vulnerable to Stored XSS on Tags on uploaded files.
- Record
CVE-2023-28476- Updated
- 2026-11-02
EUVDEUVD-2023-1156 No score
Concrete CMS (previously concrete5) in versions 9.0 through 9.1.3 is vulnerable to Stored XSS on Tags on uploaded files.
- Record
EUVD-2023-1156- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-2ggc-552c-rmqr
Stored cross site scripting on tags
Concrete CMS (previously concrete5) before 9.2 is vulnerable to Stored XSS on Tags on uploaded files.
- Record
GHSA-2ggc-552c-rmqr- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSVGHSA-2ggc-552c-rmqr
Stored cross site scripting on tags
Concrete CMS (previously concrete5) before 9.2 is vulnerable to Stored XSS on Tags on uploaded files.
- Record
GHSA-2ggc-552c-rmqr- CVSS 3.1
- 5.4 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Weakness
- CWE-79
- Updated
- 2026-11-02
OSV No score
Concrete CMS (previously concrete5) in versions 9.0 through 9.1.3 is vulnerable to Stored XSS on Tags on uploaded files.
- Record
CVE-2023-28476- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
concrete5/concrete5Packagist |
before 9.2.0 | 9.2.0 |
concrete5/concrete5Packagist |
before 9.2.0, plus listed versions 8.08.0.18.0.28.0.38.1.0 Show 45 moreShow less8.2.08.2.0RC28.2.18.3.08.3.18.3.28.4.08.4.0RC38.4.0RC48.4.18.4.28.4.38.4.48.4.58.5.08.5.0RC18.5.0RC28.5.18.5.108.5.118.5.128.5.138.5.148.5.158.5.168.5.178.5.188.5.198.5.28.5.208.5.218.5.38.5.48.5.58.5.68.5.6RC18.5.78.5.88.5.99.0.09.0.0RC19.0.0RC39.0.0RC49.0.19.0.2 |
9.2.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-28476 is a medium vulnerability (CVSS 5.4) in Concretecms Concrete Cms, published April 28, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.54%, the 45th percentile. Fixed in concrete5/concrete5 9.2.0.
References
concretecms.com
concretecms.org/about/project-news/security/concrete-cms-security-advisory-2023-04-20
nvd.nist.gov/vuln/detail/CVE-2023-28476
github.com/advisories/GHSA-2ggc-552c-rmqr
Left out here: 5 versions. The JSON record has them.