CVE-2026-3427

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Source
https://cve.org/CVERecord?id=CVE-2026-3427
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3427.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-3427
Published
2026-03-22T03:26:35.127Z
Modified
2026-07-08T08:12:50.181868120Z
Severity
  • 6.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N CVSS Calculator
Summary
Yoast SEO <= 27.1.1 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'jsonText' Block Attribute
Details

The Yoast SEO – Advanced SEO with real-time guidance and built-in AI plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the the jsonText block attribute in all versions up to, and including, 27.1.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3427.json",
    "cna_assigner": "Wordfence",
    "cwe_ids": [
        "CWE-79"
    ]
}
References

Affected packages

Git / github.com/yoast/wordpress-seo

Affected ranges

Type
GIT
Repo
https://github.com/yoast/wordpress-seo
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
c4082427f1645be0b2e7d8534b588670dc2050ef
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "27.1.1"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

1.*
1.4.15
1.4.18
1.4.20
1.4.21
1.4.22
1.4.23
1.4.24
1.4.25
1.5.0
1.5.1
1.5.2
1.5.2.1
1.5.2.2
1.5.2.3
1.5.2.4
1.5.5
1.5.5.1
1.5.5.2
1.5.5.3
1.5.6
1.6
1.6.1
1.6.2
1.6.3
1.8-beta
10.*
10.0
10.0.1
10.1
10.1.1
10.1.2
10.1.3
11.*
11.0
11.1
11.1.1
11.2
11.2.1
11.3
11.4
11.5
11.6
11.7
11.8
11.9
12.*
12.0
12.1
12.2
12.3
12.4
12.5
12.5.1
12.6
12.6.1
12.6.2
12.7
12.7.1
12.8
12.8.1
12.9
12.9.1
13.*
13.0
13.1
13.2
13.3
13.4
13.5
14.*
14.0
14.0.1
14.0.2
14.0.3
14.0.4
14.1
14.2
14.3
14.4
14.4.1
14.5
14.6
14.6.1
14.7
14.8
14.8.1
14.9
15.*
15.0
15.1
15.1.1
15.2
15.2.1
15.3
15.4
15.5
15.6
15.6.1
15.6.2
15.7
15.8
15.8.1-RC1
15.9
15.9.1
15.9.2
16.*
16.0
16.0.1
16.0.2
16.1
16.1.1
16.2
16.3
16.4
16.5
16.6
16.6.1
16.7
16.8
16.9
17.*
17.0
17.1
17.2
17.2.1
17.3
17.4
17.5
17.6
17.7
17.7.1
17.8
17.9
18.*
18.0
18.1
18.2
18.3
18.4.1
18.5
18.5.1
18.6
18.7
18.8
18.9
19.*
19.0
19.1
19.10
19.11
19.12
19.13
19.14
19.2
19.3
19.4
19.5
19.5.1
19.6
19.6.1
19.7
19.7.1
19.7.2
19.8
19.9
2.*
2.0
2.0.1
2.1
2.1.1
2.2
2.2.1
2.3
2.3.1
2.3.2
20.*
20.0
20.1
20.10
20.11
20.12
20.13
20.2
20.2.1
20.3
20.4
20.5
20.6
20.7
20.8
20.9
21.*
21.0
21.1
21.2
21.3
21.4
21.5
21.6
21.7
21.8
21.8.1
21.9
21.9.1
22.*
22.0
22.1
22.2
22.3
22.4
22.5
22.6
22.7
22.8
22.9
23.*
23.0
23.1
23.2
23.3
23.4
23.5
23.6
23.7
23.8
23.9
24.*
24.0
24.1
24.2
24.3
24.4
24.5
24.6
24.7
24.8
24.8.1
24.9
25.*
25.0
25.1
25.2
25.3
25.3.1
25.4
25.5
25.6
25.7
25.8
25.9
26.*
26.0
26.1
26.1.1
26.2
26.3
26.4
26.5
26.6
26.7
26.8
26.9
27.*
27.0
27.1
27.1.1
3.*
3.0
3.0.1
3.0.2
3.0.3
3.0.4
3.0.5
3.0.6
3.3.1
3.4
3.7.0
4.*
4.5
4.6
4.7
4.8
4.9
5.*
5.1
5.2
5.3
5.3.1
5.3.2
5.3.3
5.4.0
5.4.1
5.4.2
5.5
5.5.1
5.6
5.6.1
5.7
5.7.1
5.8
5.9
5.9.1
5.9.2
5.9.3
6.*
6.0
6.1
6.1.1
6.2
6.3
6.3.1
7.*
7.0
7.0.1
7.0.2
7.0.3
7.1
7.2
7.3
7.4
7.4.1
7.4.2
7.5
7.5.1
7.5.3
7.6
7.6.1
7.7
7.7.1
7.7.2
7.7.3
7.8
7.9
7.9.1
8.*
8.0
8.1
8.1.1
8.1.2
8.2
8.2.1
8.3
8.4
9.*
9.0
9.0.1
9.0.2
9.0.3
9.1
9.2
9.2.1
9.3
9.4
9.5
9.6
9.7

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3427.json"