CVE-2021-45394
Cross-site Scripting in HTML2PDF
An issue was discovered in Spipu HTML2PDF before 5.2.4. Attackers can trigger deserialization of arbitrary data via the injection of a malicious <link> tag in the converted HTML document.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- 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
An issue was discovered in Spipu HTML2PDF before 5.2.4. Attackers can trigger deserialization of arbitrary data via the injection of a malicious <link> tag in the converted HTML document.
- Record
CVE-2021-45394- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-502, CWE-918
- Updated
- 2026-11-02
CVE List No score
An issue was discovered in Spipu HTML2PDF before 5.2.4. Attackers can trigger deserialization of arbitrary data via the injection of a malicious <link> tag in the converted HTML document.
- Record
CVE-2021-45394- Updated
- 2026-11-02
EUVDEUVD-2022-0482 No score
An issue was discovered in Spipu HTML2PDF before 5.2.4. Attackers can trigger deserialization of arbitrary data via the injection of a malicious <link> tag in the converted HTML document.
- Record
EUVD-2022-0482- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-6m93-343m-3jrc
Cross-site Scripting in HTML2PDF
An issue was discovered in Spipu HTML2PDF before 5.2.4. Attackers can trigger deserialization of arbitrary data via the injection of a malicious <link> tag in the converted HTML document.
- Record
GHSA-6m93-343m-3jrc- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-79, CWE-918
- Updated
- 2026-11-02
OSV
An issue was discovered in Spipu HTML2PDF before 5.2.4. Attackers can trigger deserialization of arbitrary data via the injection of a malicious <link> tag in the converted HTML document.
- Record
CVE-2021-45394- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-6m93-343m-3jrc
Cross-site Scripting in HTML2PDF
An issue was discovered in Spipu HTML2PDF before 5.2.4. Attackers can trigger deserialization of arbitrary data via the injection of a malicious <link> tag in the converted HTML document.
- Record
GHSA-6m93-343m-3jrc- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-79, CWE-918
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
spipu/html2pdfPackagist |
before 5.2.4 | 5.2.4 |
spipu/html2pdfPackagist |
before 5.2.4, plus listed versions v4.4.0v4.5.0v4.5.1v4.6.0v4.6.1 Show 7 moreShow lessv5.0.0v5.0.1v5.1.0v5.2.0v5.2.1v5.2.2v5.2.3 |
5.2.4 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-45394 is a high vulnerability (CVSS 8.8) in Html2pdf Project Html2pdf, published January 18, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.58%, the 75th percentile. Fixed in spipu/html2pdf 5.2.4.
References
github.com/spipu/html2pdf
synacktiv.com/sites/default/files/2022-01/html2pdf_ssrf_deserialization.pdf
nvd.nist.gov/vuln/detail/CVE-2021-45394