XSS in Bolt
CVE-2020-4041
In Bolt CMS before version 3.7.1, the filename of uploaded files was vulnerable to stored XSS. It is not possible to inject javascript code in the file name when creating/uploading the file. But, once created/uploaded, it can be renamed to inject the payload in it. Additionally, the measures to prevent renaming the file to disallowed filename extensions could be circumvented. This is fixed in Bolt 3.7.1.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.020 (80.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
- Bolt — versions < 3.7.1
- Boltcms Bolt
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/bolt/bolt/pull/7853 (Patch, Third Party Advisory)
- github.com/bolt/bolt/commit/b42cbfcf3e3108c46a80581216ba03ef449e419f (Patch, Third Party Advisory)
- github.com/bolt/bolt/security/advisories/GHSA-68q3-7wjp-7q3j (Patch, Third Party Advisory)
- packetstormsecurity.com/files/158299/Bolt-CMS-3.7.0-XSS-CSRF-Shell-Upload.html (Exploit, VDB Entry, Third Party Advisory)
- seclists.org/fulldisclosure/2020/Jul/4 (mailing-list, Exploit, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-4041?
- CVE-2020-4041 is a high-severity vulnerability in Bolt, classified under Cross-site Scripting. CVSS score: 7.4/10. Published 2020-06-08.
- How severe is CVE-2020-4041?
- High severity. CVSS v3 base score is 7.4 out of 10.
- Is CVE-2020-4041 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.