Description

Wagtail is an open source content management system built on Django. A cross-site scripting vulnerability exists in versions 2.13-2.13.1, versions 2.12-2.12.4, and versions prior to 2.11.8. When the `{% include_block %}` template tag is used to output the value of a plain-text StreamField block (`CharBlock`, `TextBlock` or a similar user-defined block derived from `FieldBlock`), and that block does not specify a template for rendering, the tag output is not properly escaped as HTML. This could allow users to insert arbitrary HTML or scripting. This vulnerability is only exploitable by users with the ability to author StreamField content (i.e. users with 'editor' access to the Wagtail admin). Patched versions have been released as Wagtail 2.11.8 (for the LTS 2.11 branch), Wagtail 2.12.5, and Wagtail 2.13.2 (for the current 2.13 branch). As a workaround, site implementors who are unable to upgrade to a current supported version should audit their use of `{% include_block %}` to ensure it is not used to output `CharBlock` / `TextBlock` values with no associated template. Note that this only applies where `{% include_block %}` is used directly on that block (uses of `include_block` on a block _containing_ a CharBlock / TextBlock, such as a StructBlock, are unaffected). In these cases, the tag can be replaced with Django's `{{ ... }}` syntax - e.g. `{% include_block my_title_block %}` becomes `{{ my_title_block }}`.

Severity

 

CVSS Version 3.x CVSS Version 2.0

CVSS 3.x Severity and Metrics:

CNA:  GitHub, Inc.

Base Score:  5.4 MEDIUM

Vector:  CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: The NVD and the CNA have provided the same score. When this occurs only the CNA information is displayed, but the Acceptance Level icon for the CNA is given a checkmark to signify NVD concurrence.

CVSS 2.0 Severity and Metrics:

NIST: NVD

Base Score:  3.5 LOW

Vector:  (AV:N/AC:M/Au:S/C:N/I:P/A:N)

NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
https://github.com/wagtail/wagtail/releases/tag/v2.11.8	Exploit  Third Party Advisory
https://github.com/wagtail/wagtail/releases/tag/v2.12.5	Exploit  Third Party Advisory
https://github.com/wagtail/wagtail/releases/tag/v2.13.2	Exploit  Third Party Advisory
https://github.com/wagtail/wagtail/security/advisories/GHSA-xfrw-hxr5-ghqf	Mitigation  Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	GitHub, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

1 change records found show changes

Initial Analysis by NIST 6/23/2021 8:28:40 AM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR *cpe:2.3:a:torchbox:wagtail:*:*:*:*:*:*:*:* versions up to (excluding) 2.11.8 *cpe:2.3:a:torchbox:wagtail:*:*:*:*:*:*:*:* versions from (including) 2.12 up to (including) 2.12.4 *cpe:2.3:a:torchbox:wagtail:*:*:*:*:*:*:*:* versions from (including) 2.13 up to (including) 2.13.1
Added	CVSS V2		NIST (AV:N/AC:M/Au:S/C:N/I:P/A:N)
Added	CVSS V2 Metadata		Victim must voluntarily interact with attack mechanism
Added	CVSS V3.1		NIST AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Changed	Reference Type	https://github.com/wagtail/wagtail/releases/tag/v2.11.8 No Types Assigned	https://github.com/wagtail/wagtail/releases/tag/v2.11.8 Exploit, Third Party Advisory
Changed	Reference Type	https://github.com/wagtail/wagtail/releases/tag/v2.12.5 No Types Assigned	https://github.com/wagtail/wagtail/releases/tag/v2.12.5 Exploit, Third Party Advisory
Changed	Reference Type	https://github.com/wagtail/wagtail/releases/tag/v2.13.2 No Types Assigned	https://github.com/wagtail/wagtail/releases/tag/v2.13.2 Exploit, Third Party Advisory
Changed	Reference Type	https://github.com/wagtail/wagtail/security/advisories/GHSA-xfrw-hxr5-ghqf No Types Assigned	https://github.com/wagtail/wagtail/security/advisories/GHSA-xfrw-hxr5-ghqf Mitigation, Third Party Advisory