CVE-2020-15275
HIGH8.7EPSS 0.42%malicious SVG attachment causing stored XSS vulnerability
Description
### 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
Affected packages (4)
- Debian/moinfrom 0, < 1.9.9-1+deb9u2
- Debian/moinfrom 0, < 1.9.9-1+deb10u1
- PyPI/moinfrom 0, < 1.9.11
- PyPI/moinfrom 0, < 31de9139d0aabc171e94032168399b4a0b2a88a2 | from 0, < 1.9.11
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N |
| osv | CVSS 3.1 | HIGH8.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N |
References (8)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2020-15275
- PATCHhttps://github.com/moinwiki/moin-1.9
- WEBhttps://advisory.checkmarx.net/advisory/CX-2020-4285
- WEBhttps://github.com/moinwiki/moin-1.9/commit/31de9139d0aabc171e94032168399b4a0b2a88a2
- WEBhttps://github.com/moinwiki/moin-1.9/releases/tag/1.9.11
- WEBhttps://github.com/moinwiki/moin-1.9/security/advisories/GHSA-4q96-6xhq-ff43
- WEBhttps://github.com/pypa/advisory-database/tree/main/vulns/moin/PYSEC-2020-241.yaml
- WEBhttps://pypi.org/project/moin