CVE-2025-48203 json
[clickstorm] SEO (cs_seo) TYPO3 extension Cross-site Scripting (XSS) vulnerability
published last yr. modified 4mo ago also GHSA-6p8w-pc35-mqv8 , EUVD-2025-16027
- cvss
- 6.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 16%
- public exploits
- 0
- none known
Summary
The cs_seo extension through 9.2.0 for TYPO3 allows XSS.
Patch / fix
- packagist clickstorm/cs-seo 6.8.0, 7.5.0, 8.4.0, 9.3.0
- TYPO3 cs seo extension 6.8.0, 7.5.0, 8.4.0, 9.3.0
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N |
| GitHub | 3.1 | 5.5 | 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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | 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 |
Affected products
- TYPO3 cs seo extension
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/clickstorm/cs_seo/commit/1cf6c40821102b1f1508fe4e76825569340c8f90
web
-
typo3.org
/security/advisory/typo3-ext-sa-2025-005
web
-
nvd.nist.gov
/vuln/detail/CVE-2025-48203
advisory
-
github.com
/FriendsOfPHP/security-advisories/blob/master/clickstorm/cs-seo/CVE-2025-48203.yaml
web
-
github.com
/clickstorm/cs_seo
package
Sources
- CVE List CVE-2025-48203
- GitHub Advisory GHSA-6p8w-pc35-mqv8
- NVD CVE-2025-48203
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