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Package Instance

Lookup for vulnerable packages by Package URL.

Purlpkg:composer/typo3/cms-backend@9.5.25
Typecomposer
Namespacetypo3
Namecms-backend
Version9.5.25
Qualifiers
Subpath
Is_vulnerablefalse
Next_non_vulnerable_version12.4.41
Latest_non_vulnerable_version14.3.0
Affected_by_vulnerabilities
Fixing_vulnerabilities
0
url VCID-t3jn-vwbx-u7cr
vulnerability_id VCID-t3jn-vwbx-u7cr
summary 
Cross-Site Scripting in Content Preview (CType menu)
### Problem
It has been discovered that content elements of type _menu_ are vulnerable to cross-site scripting when their referenced items get previewed in the page module. A valid backend user account is needed to exploit this vulnerability.

### Solution
Update to TYPO3 versions 7.6.51, 8.7.40, 9.5.25, 10.4.14, 11.1.1 that fix the problem described.

### Credits
Thanks to TYPO3 contributor Oliver Bartsch who reported and fixed the issue.

### References
* [TYPO3-CORE-SA-2021-008](https://typo3.org/security/advisory/typo3-core-sa-2021-008)
references
0
reference_url https://api.first.org/data/v1/epss?cve=CVE-2021-21370
reference_id
reference_type
scores
0
value 0.00342
scoring_system epss
scoring_elements 0.56873
published_at 2026-04-02T12:55:00Z
1
value 0.00342
scoring_system epss
scoring_elements 0.56836
published_at 2026-04-29T12:55:00Z
2
value 0.00342
scoring_system epss
scoring_elements 0.56852
published_at 2026-04-26T12:55:00Z
3
value 0.00342
scoring_system epss
scoring_elements 0.56835
published_at 2026-04-24T12:55:00Z
4
value 0.00342
scoring_system epss
scoring_elements 0.56917
published_at 2026-04-18T12:55:00Z
5
value 0.00342
scoring_system epss
scoring_elements 0.56921
published_at 2026-04-16T12:55:00Z
6
value 0.00342
scoring_system epss
scoring_elements 0.56891
published_at 2026-04-13T12:55:00Z
7
value 0.00342
scoring_system epss
scoring_elements 0.56914
published_at 2026-04-12T12:55:00Z
8
value 0.00342
scoring_system epss
scoring_elements 0.56935
published_at 2026-04-11T12:55:00Z
9
value 0.00342
scoring_system epss
scoring_elements 0.56926
published_at 2026-04-09T12:55:00Z
10
value 0.00342
scoring_system epss
scoring_elements 0.56922
published_at 2026-04-08T12:55:00Z
11
value 0.00342
scoring_system epss
scoring_elements 0.56871
published_at 2026-04-07T12:55:00Z
12
value 0.00342
scoring_system epss
scoring_elements 0.56779
published_at 2026-04-01T12:55:00Z
13
value 0.00342
scoring_system epss
scoring_elements 0.56895
published_at 2026-04-21T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2021-21370
1
reference_url https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-21370.yaml
reference_id
reference_type
scores
0
value 5.4
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
1
value MODERATE
scoring_system generic_textual
scoring_elements
url https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-21370.yaml
2
reference_url https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-21370.yaml
reference_id
reference_type
scores
0
value 5.4
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
1
value MODERATE
scoring_system generic_textual
scoring_elements
url https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-21370.yaml
3
reference_url https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-x7hc-x7fm-f7qh
reference_id
reference_type
scores
0
value 5.4
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
1
value MODERATE
scoring_system cvssv3.1_qr
scoring_elements
2
value MODERATE
scoring_system generic_textual
scoring_elements
url https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-x7hc-x7fm-f7qh
4
reference_url https://nvd.nist.gov/vuln/detail/CVE-2021-21370
reference_id
reference_type
scores
0
value 5.4
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
1
value MODERATE
scoring_system generic_textual
scoring_elements
url https://nvd.nist.gov/vuln/detail/CVE-2021-21370
5
reference_url https://packagist.org/packages/typo3/cms-backend
reference_id
reference_type
scores
0
value 5.4
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
1
value MODERATE
scoring_system generic_textual
scoring_elements
url https://packagist.org/packages/typo3/cms-backend
6
reference_url https://typo3.org/security/advisory/typo3-core-sa-2021-008
reference_id
reference_type
scores
0
value 5.4
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
1
value MODERATE
scoring_system generic_textual
scoring_elements
url https://typo3.org/security/advisory/typo3-core-sa-2021-008
7
reference_url https://github.com/advisories/GHSA-x7hc-x7fm-f7qh
reference_id GHSA-x7hc-x7fm-f7qh
reference_type
scores
0
value MODERATE
scoring_system cvssv3.1_qr
scoring_elements
url https://github.com/advisories/GHSA-x7hc-x7fm-f7qh
fixed_packages
0
url pkg:composer/typo3/cms-backend@7.6.51
purl pkg:composer/typo3/cms-backend@7.6.51
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:composer/typo3/cms-backend@7.6.51
1
url pkg:composer/typo3/cms-backend@8.7.40
purl pkg:composer/typo3/cms-backend@8.7.40
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:composer/typo3/cms-backend@8.7.40
2
url pkg:composer/typo3/cms-backend@9.5.25
purl pkg:composer/typo3/cms-backend@9.5.25
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:composer/typo3/cms-backend@9.5.25
3
url pkg:composer/typo3/cms-backend@10.4.14
purl pkg:composer/typo3/cms-backend@10.4.14
is_vulnerable true
affected_by_vulnerabilities
0
vulnerability VCID-716n-jhj7-ebhh
1
vulnerability VCID-uvfp-uq3t-6ffg
2
vulnerability VCID-ymvw-ev1y-8fa3
resource_url http://public2.vulnerablecode.io/packages/pkg:composer/typo3/cms-backend@10.4.14
4
url pkg:composer/typo3/cms-backend@11.1.1
purl pkg:composer/typo3/cms-backend@11.1.1
is_vulnerable true
affected_by_vulnerabilities
0
vulnerability VCID-716n-jhj7-ebhh
1
vulnerability VCID-uvfp-uq3t-6ffg
2
vulnerability VCID-ymvw-ev1y-8fa3
resource_url http://public2.vulnerablecode.io/packages/pkg:composer/typo3/cms-backend@11.1.1
aliases CVE-2021-21370, GHSA-x7hc-x7fm-f7qh
risk_score 3.1
exploitability 0.5
weighted_severity 6.2
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-t3jn-vwbx-u7cr
Risk_scorenull
Resource_urlhttp://public2.vulnerablecode.io/packages/pkg:composer/typo3/cms-backend@9.5.25