CVE-2021-3986 Information Disclosure in janeczku/calibre-web
Unauthorized users can view private shelf names of other users via error messages in Calibre-web, exposing sensitive metadata.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-3986?
CVE-2021-3986 is a medium-severity vulnerability in janeczku/calibre-web, published on 15 Nov 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability in janeczku/calibre-web allows unauthorized users to view the names of private shelves belonging to other users. This issue occurs in the file shelf.py at line 221, where the name of the shelf is exposed in an error message when a user attempts to remove a book from a shelf they do not own. This vulnerability discloses private information and affects all versions prior to the fix.
Weakness: CWE-209
Which versions are affected by CVE-2021-3986?
3 open source packages ship an affected version, including calibreweb. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
calibreweb PyPI | All versions | 0.6.15 |
calibreweb PyPI | All versions | 0.6.15 |
calibreweb PyPI | All versions | 0.6.15 |
Products include Janeczku Calibre-Web.
How do I fix CVE-2021-3986?
Upgrade calibreweb to 0.6.15 or later.
Is CVE-2021-3986 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-3986 exists.
Other vulnerabilities in janeczku/calibre-web
- CVE-2022-30765 SQL injection in calibreweb
- CVE-2020-12627 Hardcoded credentials in n/a
- CVE-2022-0990 Server-Side Request Forgery (SSRF) in janeczku/calibre-web
- CVE-2022-0767 Server-Side Request Forgery (SSRF) in janeczku/calibre-web
- CVE-2022-0939 Server-Side Request Forgery (SSRF) in janeczku/calibre-web
Sources
Also known as GHSA-m982-h4f8-g4hf, PYSEC-2026-1232.