CVE-2021-23413
Denial of Service (DoS)
This affects the package jszip before 3.7.0. Crafting a new zip file with filenames set to Object prototype values (e.g proto, toString, etc) results in a returned object with a modified prototype instance.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Denial of Service (DoS)
This affects the package jszip before 3.7.0. Crafting a new zip file with filenames set to Object prototype values (e.g proto, toString, etc) results in a returned object with a modified prototype instance.
- Record
CVE-2021-23413- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-02
EUVDEUVD-2021-1773
This affects the package jszip before 3.7.0. Crafting a new zip file with filenames set to Object prototype values (e.g proto, toString, etc) results in a returned object with a modified prototype instance.
- Record
EUVD-2021-1773- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-jg8v-48h5-wgxg
jszip Vulnerable to Prototype Pollution
This affects the package jszip before 3.7.0. Crafting a new zip file with filenames set to Object prototype values (e.g __proto__, toString, etc) results in a returned object with a modified prototype instance.
- Record
GHSA-jg8v-48h5-wgxg- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Weakness
- CWE-1321
- Updated
- 2026-11-02
NVD
This affects the package jszip before 3.7.0. Crafting a new zip file with filenames set to Object prototype values (e.g proto, toString, etc) results in a returned object with a modified prototype instance.
- Record
CVE-2021-23413- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Updated
- 2026-11-02
OSV
This affects the package jszip before 3.7.0. Crafting a new zip file with filenames set to Object prototype values (e.g proto, toString, etc) results in a returned object with a modified prototype instance.
- Record
CVE-2021-23413- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-02
OSVDEBIAN-CVE-2021-23413
This affects the package jszip before 3.7.0. Crafting a new zip file with filenames set to Object prototype values (e.g proto, toString, etc) results in a returned object with a modified prototype instance.
- Record
DEBIAN-CVE-2021-23413- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-02
OSVGHSA-jg8v-48h5-wgxg
jszip Vulnerable to Prototype Pollution
This affects the package jszip before 3.7.0. Crafting a new zip file with filenames set to Object prototype values (e.g __proto__, toString, etc) results in a returned object with a modified prototype instance.
- Record
GHSA-jg8v-48h5-wgxg- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Weakness
- CWE-1321
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2021-23413
This affects the package jszip before 3.7.0. Crafting a new zip file with filenames set to Object prototype values (e.g proto, toString, etc) results in a returned object with a modified prototype instance.
- Record
UBUNTU-CVE-2021-23413- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
jszipnpm |
3.0.0 up to 3.7.0 | 3.7.0 |
jszipnpm |
before 2.7.0 | 2.7.0 |
node-jszipDebian:12 |
before 3.5.0+dfsg-2 | 3.5.0+dfsg-2 |
node-jszipDebian:13 |
before 3.5.0+dfsg-2 | 3.5.0+dfsg-2 |
node-jszipDebian:14 |
before 3.5.0+dfsg-2 | 3.5.0+dfsg-2 |
node-jszipUbuntu:18.04:LTS |
All versions, plus listed versions 3.1.4+dfsg-1 |
None known |
node-jszipUbuntu:20.04:LTS |
All versions, plus listed versions 3.2.2+dfsg-1 |
None known |
node-jszipUbuntu:22.04:LTS |
All versions, plus listed versions 3.5.0+dfsg-23.7.1+dfsg-1 |
None known |
node-jszipUbuntu:24.04:LTS |
All versions, plus listed versions 3.10.1+dfsg-2 |
None known |
node-jszipUbuntu:25.10 |
All versions, plus listed versions 3.10.1+dfsg-2 |
None known |
node-jszipUbuntu:26.10 |
All versions, plus listed versions 3.10.1+dfsg-2 |
None known |
node-jszipUbuntu:26.04:LTS |
All versions, plus listed versions 3.10.1+dfsg-2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-23413 is a medium vulnerability (CVSS 5.3) in Jszip Project Jszip, published July 25, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.44%, the 89th percentile. Fixed in jszip 3.7.0.