GHSA-4q96-6xhq-ff43
malicious SVG attachment causing stored XSS vulnerability
Packages
Details
As written in the advisory (Markdown source, shown as plain text).
### 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]](mailto:[email protected]).
### Credits
This vulnerability was discovered by:
Catarina Leite from the Checkmarx SCA AppSec team
References
External links from the advisory. They lead to third-party sites.
- https://github.com/moinwiki/moin-1.9/security/advisories/GHSA-4q96-6xhq-ff43
- https://nvd.nist.gov/vuln/detail/CVE-2020-15275
- https://github.com/moinwiki/moin-1.9/commit/31de9139d0aabc171e94032168399b4a0b2a88a2
- https://advisory.checkmarx.net/advisory/CX-2020-4285
- https://github.com/moinwiki/moin-1.9
- https://github.com/moinwiki/moin-1.9/releases/tag/1.9.11
- https://github.com/pypa/advisory-database/tree/main/vulns/moin/PYSEC-2020-241.yaml
- https://pypi.org/project/moin