CVE-2020-27783
Published: 3 December 2020
A XSS vulnerability was discovered in python-lxml's clean module. The module's parser didn't properly imitate browsers, which caused different behaviors between the sanitizer and the user's page. A remote attacker could exploit this flaw to run arbitrary HTML/JS code.
Notes
| Author | Note |
|---|---|
| sbeattie | according to lxml upstream, first commit does not fix completely, second commit is needed/fixes issue better. |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
lxml Launchpad, Ubuntu, Debian |
bionic |
Released
(4.2.1-1ubuntu0.3)
|
| focal |
Released
(4.5.0-1ubuntu0.2)
|
|
| groovy |
Released
(4.5.2-1ubuntu0.3)
|
|
| trusty |
Released
(3.3.3-1ubuntu0.2+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Released
(4.6.2-1)
|
|
| xenial |
Released
(3.5.0-1ubuntu0.3)
|
|
|
Patches: upstream: https://github.com/lxml/lxml/commit/89e7aad6e7ff9ecd88678ff25f885988b184b26e upstream: https://github.com/lxml/lxml/commit/a105ab8dc262ec6735977c25c13f0bdfcdec72a7 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.1 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | Required |
| Scope | Changed |
| Confidentiality | Low |
| Integrity impact | Low |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |