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CVE-2024-2753

Concrete CMS version 9 below 9.2.8 and below 8.5.16 is vulnerable to stored XSS on the calendar color settings screen

2.0 LowFix available

Concrete CMS version 9 before 9.2.8 and previous versions prior to 8.5.16 is vulnerable to Stored XSS on the calendar color settings screen since Information input by the user is output without escaping. A rogue administrator could inject malicious javascript into the Calendar Color Settings screen which might be executed when users visit the affected page. The Concrete CMS security team gave this vulnerability a CVSS v3.1 score of 2.0 with a vector of AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N&version=3.1 https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator  

Thank you Rikuto Tauchi for reporting

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
High
User interaction
Required

What an attacker can affect

Confidentiality
Low
Integrity
None
Availability
None

Exploit likelihood

0.36%Up 0.3 points since Apr 4, 2024
90%50%10%1%

What each source reports

CVE List Score used 2.0

Concrete CMS version 9 below 9.2.8 and below 8.5.16 is vulnerable to stored XSS on the calendar color settings screen

Concrete CMS version 9 before 9.2.8 and previous versions prior to 8.5.16 is vulnerable to Stored XSS on the calendar color settings screen since Information input by the user is output without escaping. A rogue administrator could inject malicious javascript into the Calendar Color Settings screen which might be executed when users visit the affected page. The Concrete CMS security team gave this vulnerability a CVSS v3.1 score of 2.0 with a vector of AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N&version=3.1 https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator  

Thank you Rikuto Tauchi for reporting

Record
CVE-2024-2753
CVSS 3.1
2.0 LowCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N
Weakness
CWE-79
Updated
2026-11-02
EUVDEUVD-2024-1266 2.0

Concrete CMS version 9 before 9.2.8 and previous versions prior to 8.5.16 is vulnerable to Stored XSS on the calendar color settings screen since Information input by the user is output without escaping. A rogue administrator could inject malicious javascript into the Calendar Color Settings screen which might be executed when users visit the affected page. The Concrete CMS security team gave this vulnerability a CVSS v3.1 score of 2.0 with a vector of AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N&version=3.1 https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator  

Thank you Rikuto Tauchi for reporting

Record
EUVD-2024-1266
CVSS 3.1
2.0 LowCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-pj42-r64f-4xfq 2.0

Concrete CMS Stored XSS on the calendar color settings screen

Concrete CMS version 9 before 9.2.8 and previous versions prior to 8.5.16 is vulnerable to Stored XSS on the calendar color settings screen since Information input by the user is output without escaping. A rogue administrator could inject malicious javascript into the Calendar Color Settings screen which might be executed when users visit the affected page. The Concrete CMS security team gave this vulnerability a CVSS v3.1 score of 2.0 with a vector of AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N&version=3.1 https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator  

Thank you Rikuto Tauchi for reporting

Record
GHSA-pj42-r64f-4xfq
CVSS 3.1
2.0 LowCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N
Weakness
CWE-20, CWE-79
Updated
2026-11-02
NVD 2.0

Concrete CMS version 9 before 9.2.8 and previous versions prior to 8.5.16 is vulnerable to Stored XSS on the calendar color settings screen since Information input by the user is output without escaping. A rogue administrator could inject malicious javascript into the Calendar Color Settings screen which might be executed when users visit the affected page. The Concrete CMS security team gave this vulnerability a CVSS v3.1 score of 2.0 with a vector of AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N&version=3.1 https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator  

Thank you Rikuto Tauchi for reporting

Record
CVE-2024-2753
CVSS 3.1
2.0 LowCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N
CVSS 3.1
4.8 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSV 2.0

Concrete CMS version 9 below 9.2.8 and below 8.5.16 is vulnerable to stored XSS on the calendar color settings screen

Concrete CMS version 9 before 9.2.8 and previous versions prior to 8.5.16 is vulnerable to Stored XSS on the calendar color settings screen since Information input by the user is output without escaping. A rogue administrator could inject malicious javascript into the Calendar Color Settings screen which might be executed when users visit the affected page. The Concrete CMS security team gave this vulnerability a CVSS v3.1 score of 2.0 with a vector of AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N&version=3.1 https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator  

Thank you Rikuto Tauchi for reporting

Record
CVE-2024-2753
CVSS 3.1
2.0 LowCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N
Weakness
CWE-79
Updated
2026-11-02
OSVGHSA-pj42-r64f-4xfq 2.0

Concrete CMS Stored XSS on the calendar color settings screen

Concrete CMS version 9 before 9.2.8 and previous versions prior to 8.5.16 is vulnerable to Stored XSS on the calendar color settings screen since Information input by the user is output without escaping. A rogue administrator could inject malicious javascript into the Calendar Color Settings screen which might be executed when users visit the affected page. The Concrete CMS security team gave this vulnerability a CVSS v3.1 score of 2.0 with a vector of AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N&version=3.1 https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator  

Thank you Rikuto Tauchi for reporting

Record
GHSA-pj42-r64f-4xfq
CVSS 3.1
2.0 LowCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N
Weakness
CWE-20, CWE-79
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
concrete5/concrete5
Packagist
9.0.0RC1 up to 9.2.8
9.2.8
concrete5/concrete5
Packagist
before 8.5.16
8.5.16
concrete5/concrete5
Packagist
9.0.0RC1 up to 9.2.8, plus listed versions
9.0.09.0.0RC39.0.0RC49.0.19.0.2
Show 13 moreShow less
9.1.09.1.19.1.29.1.39.2.09.2.0RC29.2.19.2.29.2.39.2.49.2.59.2.69.2.7
9.2.8
concrete5/concrete5
Packagist
before 8.5.16, plus listed versions
8.08.0.18.0.28.0.38.1.0
Show 33 moreShow less
8.2.08.2.0RC28.2.18.3.08.3.18.3.28.4.08.4.0RC38.4.0RC48.4.18.4.28.4.38.4.48.4.58.5.08.5.0RC18.5.0RC28.5.18.5.108.5.118.5.128.5.138.5.148.5.158.5.28.5.38.5.48.5.58.5.68.5.6RC18.5.78.5.88.5.9
8.5.16

History

History
RecordedChangedSources
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2024-2753 is a low vulnerability (CVSS 2.0) in Concrete Cms Cms, published April 3, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.36%, the 30th percentile. Fixed in concrete5/concrete5 9.2.8.

References

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