CVE-2021-36788 json
Cross-site Scripting in the yoast_seo TYPO3 extension
published 5y ago modified 4mo ago also GHSA-28w5-j8xj-2xwc , EUVD-2021-1947
- cvss
- 5.4
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- public exploits
- 0
- none known
Summary
The yoast_seo (aka Yoast SEO) extension before 7.2.3 for TYPO3 allows XSS.
Patch / fix
- packagist yoast-seo-for-typo3/yoast_seo 7.2.3
- yoast yoast_seo 7.2.3
Is CVE-2021-36788 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 3.5 | AV:N/AC:M/Au:S/C:N/I:P/A:N |
| GitHub | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | yoast-seo-for-typo3/yoast_seo | <7.2.3 |
7.2.3 |
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
github.com
/Yoast/Yoast-SEO-for-TYPO3/commit/a8278dae97dce8cd0722d38f7f5a30b563668590
web
-
typo3.org
/help/security-advisories/security
vendor-advisory
-
typo3.org
/security/advisory/typo3-ext-sa-2021-013
vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-36788
advisory
-
github.com
/Yoast/Yoast-SEO-for-TYPO3
package
-
typo3.org
/security/advisory/typo3-ext-sa-2021-012
web
Sources
- CVE List CVE-2021-36788
- GitHub Advisory GHSA-28w5-j8xj-2xwc
- NVD CVE-2021-36788
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.