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Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTRxOTYtNnhocS1mZjQz
malicious SVG attachment causing stored XSS vulnerability
Impact
An attacker with write
permissions can upload an SVG file that contains malicious javascript. This javascript will be executed in a user's browser when the user is viewing that SVG file on the wiki.
Patches
Users are strongly advised to upgrade to a patched version.
MoinMoin Wiki 1.9.11 has the necessary fixes and also contains other important fixes.
Workarounds
It is not advised to work around this, but to upgrade MoinMoin to a patched version.
That said, a work around via a Content Security Policy in the web server might be possible.
Also, it is of course helpful if you give write
permissions (which include uploading attachments) only to trusted users.
For more information
If you have any questions or comments about this advisory, email me at [email protected].
Credits
This vulnerability was discovered by:
Catarina Leite from the Checkmarx SCA AppSec team
Permalink: https://github.com/advisories/GHSA-4q96-6xhq-ff43JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTRxOTYtNnhocS1mZjQz
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 3 years ago
Updated: over 1 year ago
CVSS Score: 8.7
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Identifiers: GHSA-4q96-6xhq-ff43, CVE-2020-15275
References:
- https://github.com/moinwiki/moin-1.9/security/advisories/GHSA-4q96-6xhq-ff43
- https://github.com/moinwiki/moin-1.9/commit/31de9139d0aabc171e94032168399b4a0b2a88a2
- https://github.com/moinwiki/moin-1.9/releases/tag/1.9.11
- https://pypi.org/project/moin/
- https://nvd.nist.gov/vuln/detail/CVE-2020-15275
- https://advisory.checkmarx.net/advisory/CX-2020-4285
- https://github.com/advisories/GHSA-4q96-6xhq-ff43
Blast Radius: 14.5
Affected Packages
pypi:moin
Dependent packages: 0Dependent repositories: 46
Downloads: 208 last month
Affected Version Ranges: < 1.9.11
Fixed in: 1.9.11
All affected versions: 1.8.4, 1.8.5, 1.8.6, 1.8.7, 1.9.0, 1.9.1, 1.9.2, 1.9.3, 1.9.4, 1.9.5, 1.9.6, 1.9.7, 1.9.8, 1.9.9, 1.9.10
All unaffected versions: 1.9.11