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Security Advisories: GSA_kwCzR0hTQS1oNzV2LTN2dmotNW1mas4AA7xw
Jinja vulnerable to HTML attribute injection when passing user input as keys to xmlattr filter
The xmlattr filter in affected versions of Jinja accepts keys containing non-attribute characters. XML/HTML attributes cannot contain spaces, /, >, or =, as each would then be interpreted as starting a separate attribute. If an application accepts keys (as opposed to only values) as user input, and renders these in pages that other users see as well, an attacker could use this to inject other attributes and perform XSS. The fix for the previous GHSA-h5c8-rqwp-cp95 CVE-2024-22195 only addressed spaces but not other characters.
Accepting keys as user input is now explicitly considered an unintended use case of the xmlattr filter, and code that does so without otherwise validating the input should be flagged as insecure, regardless of Jinja version. Accepting values as user input continues to be safe.
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1oNzV2LTN2dmotNW1mas4AA7xw
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 7 months ago
Updated: 6 months ago
CVSS Score: 5.4
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Identifiers: GHSA-h75v-3vvj-5mfj, CVE-2024-34064
References:
- https://github.com/pallets/jinja/security/advisories/GHSA-h75v-3vvj-5mfj
- https://github.com/pallets/jinja/commit/0668239dc6b44ef38e7a6c9f91f312fd4ca581cb
- https://nvd.nist.gov/vuln/detail/CVE-2024-34064
- https://lists.fedoraproject.org/archives/list/[email protected]/message/567XIGSZMABG6TSMYWD7MIYNJSUQQRUC
- https://lists.fedoraproject.org/archives/list/[email protected]/message/GCLF44KY43BSVMTE6S53B4V5WP3FRRSE
- https://lists.fedoraproject.org/archives/list/[email protected]/message/SSCBHIL6BYKR5NRCBXP4XMP2CEEKGFVS
- https://lists.fedoraproject.org/archives/list/[email protected]/message/ZALNWE3TXPPHVPSI3AZ5CTMSTAVN5UMS
- https://github.com/advisories/GHSA-h75v-3vvj-5mfj
Blast Radius: 27.7
Affected Packages
pypi:Jinja2
Dependent packages: 4,068Dependent repositories: 133,056
Downloads: 235,916,023 last month
Affected Version Ranges: < 3.1.4
Fixed in: 3.1.4
All affected versions: 2.1.1, 2.2.1, 2.3.1, 2.4.1, 2.5.1, 2.5.2, 2.5.3, 2.5.4, 2.5.5, 2.7.1, 2.7.2, 2.7.3, 2.8.1, 2.9.1, 2.9.2, 2.9.3, 2.9.4, 2.9.5, 2.9.6, 2.10.1, 2.10.2, 2.10.3, 2.11.0, 2.11.1, 2.11.2, 2.11.3, 3.0.0, 3.0.1, 3.0.2, 3.0.3, 3.1.0, 3.1.1, 3.1.2, 3.1.3
All unaffected versions: 3.1.4