HOMEVULNERABILITIESCVE-2024-28234
MEDIUM

CVE-2024-28234

CWE-74Published: April 9, 2024· Updated: Jun 17, 2026

4.7
CVSS v3.1

Official Description

Contao is an open source content management system. Starting in version 2.0.0 and prior to versions 4.13.40 and 5.3.4, it is possible to inject CSS styles via BBCode in comments. Installations are only affected if BBCode is enabled. Contao versions 4.13.40 and 5.3.4 have a patch for this issue. As a workaround, disable BBCode for comments.

NVD Source

Technical Analysis

CVE-2024-28234 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeChanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N

Affected Vendors & Products

contao1 product(s)
contao
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/contao/contao/commit/55b995d8d35da0d36bc6a22c53fe6423ab0c4ae2
PATCHhttps://github.com/contao/contao/commit/6d42e667177c972ae7c219645593c262d7764ce2
PATCHhttps://github.com/contao/contao/commit/55b995d8d35da0d36bc6a22c53fe6423ab0c4ae2
PATCHhttps://github.com/contao/contao/commit/6d42e667177c972ae7c219645593c262d7764ce2
ADVISORYhttps://contao.org/en/security-advisories/insufficient-bbcode-sanitization
ADVISORYhttps://github.com/contao/contao/security/advisories/GHSA-j55w-hjpj-825g
ADVISORYhttps://contao.org/en/security-advisories/insufficient-bbcode-sanitization
ADVISORYhttps://github.com/contao/contao/security/advisories/GHSA-j55w-hjpj-825g

All References (8)

→
https://contao.org/en/security-advisories/insufficient-bbcode-sanitizationVendor Advisory
→
https://github.com/contao/contao/commit/55b995d8d35da0d36bc6a22c53fe6423ab0c4ae2Patch
→
https://github.com/contao/contao/commit/6d42e667177c972ae7c219645593c262d7764ce2Patch
→
https://github.com/contao/contao/security/advisories/GHSA-j55w-hjpj-825gVendor Advisory
→
https://contao.org/en/security-advisories/insufficient-bbcode-sanitizationVendor Advisory
→
https://github.com/contao/contao/commit/55b995d8d35da0d36bc6a22c53fe6423ab0c4ae2Patch
→
https://github.com/contao/contao/commit/6d42e667177c972ae7c219645593c262d7764ce2Patch
→
https://github.com/contao/contao/security/advisories/GHSA-j55w-hjpj-825gVendor Advisory

Quick Facts

CVE IDCVE-2024-28234
CVSS Score4.7 / 10
SeverityMEDIUM
WeaknessCWE-74
CISA KEVNo
Affected1 vendor(s)
PublishedApr 9, 2024

Related CVEs (CWE-74)

CVE-2023-32314
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CVE-2023-1523
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CVE-2026-56699
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CVE-2026-44182
10.0
CVE-2023-30547
10.0
CVE-2024-38366
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Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2024-28234 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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