[clickstorm] SEO (cs_seo) TYPO3 extension Cross-site Scripting (XSS) vulnerability
Cross-site scripting (XSS) vulnerability in the [clickstorm] SEO (cs_seo) TYPO3 extension allows backend users to execute arbitrary script via the JSON-LD output.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | clickstorm/cs-seo | >= 9.0.0, < 9.3.0, >= 8.0.0, < 8.4.0, >= 7.0.0, < 7.5.0, >= 6.3.0, < 6.8.0 | 9.3.0, 8.4.0, 7.5.0, 6.8.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-48203
- https://github.com/clickstorm/cs_seo/commit/1cf6c40821102b1f1508fe4e76825569340c8f90
- https://github.com/FriendsOfPHP/security-advisories/blob/master/clickstorm/cs-seo/CVE-2025-48203.yaml
- https://github.com/clickstorm/cs_seo
- https://typo3.org/security/advisory/typo3-ext-sa-2025-005
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L/E:F/RL:O/RC:C- Weakness (CWE)
CWE-79- Platform
- Composer
- Package
clickstorm/cs-seo- Disclosed
- 21.05.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-6p8w-pc35-mqv8 - CC BY 4.0
Vulnerability history: clickstorm/cs-seo
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 03.2025 05.2025
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 2
Disclosures per year
- 2025: 2
- 2026: 0
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[clickstorm] SEO (cs_seo) TYPO3 extension Cross-site Scripting (XSS) vulnerability this entry
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