GHSA-jq4v-f5q6-mjqq
Vulnerability from github
Published
2021-03-22 16:53
Modified
2024-09-30 16:54
Severity ?
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
5.3 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Summary
lxml vulnerable to Cross-Site Scripting
Details
An XSS vulnerability was discovered in the python lxml
clean module versions before 4.6.3. When disabling the safe_attrs_only
and forms
arguments, the Cleaner
class does not remove the formaction
attribute allowing for JS to bypass the sanitizer. A remote attacker could exploit this flaw to run arbitrary JS code on users who interact with incorrectly sanitized HTML. This issue is patched in lxml
4.6.3.
{ "affected": [ { "package": { "ecosystem": "PyPI", "name": "lxml" }, "ranges": [ { "events": [ { "introduced": "0" }, { "fixed": "4.6.3" } ], "type": "ECOSYSTEM" } ] } ], "aliases": [ "CVE-2021-28957" ], "database_specific": { "cwe_ids": [ "CWE-79" ], "github_reviewed": true, "github_reviewed_at": "2021-03-22T16:52:59Z", "nvd_published_at": "2021-03-21T05:15:00Z", "severity": "MODERATE" }, "details": "An XSS vulnerability was discovered in the python `lxml` clean module versions before 4.6.3. When disabling `the safe_attrs_only` and `forms` arguments, the `Cleaner` class does not remove the `formaction` attribute allowing for JS to bypass the sanitizer. A remote attacker could exploit this flaw to run arbitrary JS code on users who interact with incorrectly sanitized HTML. This issue is patched in `lxml` 4.6.3.", "id": "GHSA-jq4v-f5q6-mjqq", "modified": "2024-09-30T16:54:23Z", "published": "2021-03-22T16:53:53Z", "references": [ { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-28957" }, { "type": "WEB", "url": "https://github.com/lxml/lxml/pull/316" }, { "type": "WEB", "url": "https://github.com/lxml/lxml/pull/316/commits/10ec1b4e9f93713513a3264ed6158af22492f270" }, { "type": "WEB", "url": "https://github.com/lxml/lxml/commit/2d01a1ba8984e0483ce6619b972832377f208a0d" }, { "type": "WEB", "url": "https://github.com/lxml/lxml/commit/a5f9cb52079dc57477c460dbe6ba0f775e14a999" }, { "type": "WEB", "url": "https://www.oracle.com/security-alerts/cpuoct2021.html" }, { "type": "WEB", "url": "https://www.debian.org/security/2021/dsa-4880" }, { "type": "WEB", "url": "https://security.netapp.com/advisory/ntap-20210521-0004" }, { "type": "WEB", "url": "https://security.gentoo.org/glsa/202208-06" }, { "type": "WEB", "url": "https://pypi.org/project/lxml" }, { "type": "WEB", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XXN3QPWCTQVOGW4BMWV3AUUZZ4NRZNSQ" }, { "type": "WEB", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3C2R44VDUY7FJVMAVRZ2WY7XYL4SVN45" }, { "type": "WEB", "url": "https://lists.debian.org/debian-lts-announce/2021/03/msg00031.html" }, { "type": "WEB", "url": "https://github.com/pypa/advisory-database/tree/main/vulns/lxml/PYSEC-2021-19.yaml" }, { "type": "PACKAGE", "url": "https://github.com/lxml/lxml" }, { "type": "ADVISORY", "url": "https://github.com/advisories/GHSA-jq4v-f5q6-mjqq" }, { "type": "WEB", "url": "https://bugs.launchpad.net/lxml/+bug/1888153" } ], "schema_version": "1.4.0", "severity": [ { "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "type": "CVSS_V3" }, { "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N", "type": "CVSS_V4" } ], "summary": "lxml vulnerable to Cross-Site Scripting " }
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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.