CVE-2020-15275
malicious SVG attachment causing stored XSS vulnerability
Impact
### 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 [twaldmann@thinkmo.de](mailto:twaldmann@thinkmo.de). ### Credits This vulnerability was discovered by: Catarina Leite from the Checkmarx SCA AppSec team
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | moin | < 1.9.11 | 1.9.11 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Moinmo | Moinmoin | before 1.9.11 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://advisory.checkmarx.net/advisory/CX-2020-4285
- https://github.com/moinwiki/moin-1.9/commit/31de9139d0aabc171e94032168399b4a0b2a88a2
- https://github.com/moinwiki/moin-1.9/releases/tag/1.9.11
- https://github.com/moinwiki/moin-1.9/security/advisories/GHSA-4q96-6xhq-ff43
- https://github.com/advisories/GHSA-4q96-6xhq-ff43
- https://nvd.nist.gov/vuln/detail/CVE-2020-15275
- https://github.com/pypa/advisory-database/tree/main/vulns/moin/PYSEC-2020-241.yaml
- https://pypi.org/project/moin