CVE-2023-30533
Prototype Pollution in sheetJS
SheetJS Community Edition before 0.19.3 allows Prototype Pollution via a crafted file. In other words. 0.19.2 and earlier are affected, whereas 0.19.3 and later are unaffected.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
SheetJS Community Edition before 0.19.3 allows Prototype Pollution via a crafted file. In other words. 0.19.2 and earlier are affected, whereas 0.19.3 and later are unaffected.
- Record
CVE-2023-30533- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-1321
- Updated
- 2026-11-02
CVE List
SheetJS Community Edition before 0.19.3 allows Prototype Pollution via a crafted file. In other words. 0.19.2 and earlier are affected, whereas 0.19.3 and later are unaffected.
- Record
CVE-2023-30533- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-1321
- Updated
- 2026-11-02
EUVDEUVD-2023-1194
SheetJS Community Edition before 0.19.3 allows Prototype Pollution via a crafted file. In other words. 0.19.2 and earlier are affected, whereas 0.19.3 and later are unaffected.
- Record
EUVD-2023-1194- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-4r6h-8v6p-xvw6
Prototype Pollution in sheetJS
All versions of SheetJS CE through 0.19.2 are vulnerable to "Prototype Pollution" when reading specially crafted files. Workflows that do not read arbitrary files (for example, exporting data to spreadsheet files) are unaffected.
A non-vulnerable version cannot be found via npm, as the repository hosted on GitHub and the npm package xlsx are no longer maintained. Version 0.19.3 can be downloaded via https://cdn.sheetjs.com/.
- Record
GHSA-4r6h-8v6p-xvw6- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-1321
- Updated
- 2026-11-02
OSVGHSA-4r6h-8v6p-xvw6
Prototype Pollution in sheetJS
All versions of SheetJS CE through 0.19.2 are vulnerable to "Prototype Pollution" when reading specially crafted files. Workflows that do not read arbitrary files (for example, exporting data to spreadsheet files) are unaffected.
A non-vulnerable version cannot be found via npm, as the repository hosted on GitHub and the npm package xlsx are no longer maintained. Version 0.19.3 can be downloaded via https://cdn.sheetjs.com/.
- Record
GHSA-4r6h-8v6p-xvw6- CVSS 3.1
- 7.8 High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-1321
- Updated
- 2026-11-02
OSVCLSA-2026-1771978233 No score
TuxCare security update for xlsx (2 CVEs)
TuxCare rebuilt xlsx to address 2 CVEs. Fixed in 0.18.5-tuxcare.1.
- Record
CLSA-2026-1771978233- Updated
- 2026-11-02
OSVROOT-APP-NPM-CVE-2023-30533 No score
CVE-2023-30533 in @rootio/xlsx - Patched by Root
Root has patched CVE-2023-30533 in the @rootio/xlsx package for Root:npm. Multiple fixed versions available.
- Record
ROOT-APP-NPM-CVE-2023-30533- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
xlsxnpm |
before 0.19.3 | 0.19.3 |
xlsxTuxCare:npm From an advisory covering 2 CVEs |
0.18.5-tuxcare.0 up to 0.18.5-tuxcare.1, plus listed versions 0.18.5 |
0.18.5-tuxcare.1 |
xlsxnpm |
All versions | None known |
@rootio/xlsxRoot:npm |
before 0.18.5-root.io.1 | 0.18.5-root.io.1 |
xlsxRoot:npm |
before 0.18.5-aikido.1 | 0.18.5-aikido.1 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | BenEdridge/CVE-2023-30533 | 2023-08-09 |
| PoC in GitHub | weareu/xlsx | 2026-02-19 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-30533 is a high vulnerability (CVSS 7.8) in Sheetjs, published April 24, 2023. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.99%, the 62nd percentile. Fixed in xlsx 0.19.3.
References
git.sheetjs.com/sheetjs/sheetjs/src/branch/master/CHANGELOG.md
cdn.sheetjs.com/advisories/CVE-2023-30533
nvd.nist.gov/vuln/detail/CVE-2023-30533
github.com/advisories/GHSA-4r6h-8v6p-xvw6