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TI-2021-04843 Aliases CVE-2021-21798GHSA-4vm8-m2w2-wpqm

An exploitable return of stack variable address vulnerability exists in the JavaScript…

Priority MEDIUM 53CWE-562Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

An exploitable return of stack variable address vulnerability exists in the JavaScript implementation of Nitro Pro PDF. A specially crafted document can cause a stack variable to go out of scope, resulting in the application dereferencing a stale pointer. This can lead to code execution under the context of the application. An attacker can convince a user to open a document to trigger the vulnerability.

Why it matters now

EPSS 0.21373 97th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Nitro ProNitro Pro 13.31.0.605 , Nitro Pro 13.33.2.645—No fix listedCNA
  • Nitro Pro Vendor— Affected Nitro Pro 13.31.0.605 , Nitro Pro 13.33.2.645 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:gonitro:nitro_pro:13.31.0.605:*:*:*:*:*:*:*13.31.0.605VulnerableGonitro
cpe:2.3:a:gonitro:nitro_pro:13.33.2.645:*:*:*:*:*:*:*13.33.2.645VulnerableGonitro
  • cpe:2.3:a:gonitro:nitro_pro:13.31.0.605:*:*:*:*:*:*:* Versions 13.31.0.605 Vulnerable ·Gonitro
  • cpe:2.3:a:gonitro:nitro_pro:13.33.2.645:*:*:*:*:*:*:* Versions 13.33.2.645 Vulnerable ·Gonitro

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-21798
  2. 2026-10-03 Alias added: GHSA-4vm8-m2w2-wpqm

References

Exploit 1

  • TI-2020-05013 Heap-based buffer overflow in Nitro Pro CVSS 3.1HIGH 8.8
  • TI-2020-04980 Integer overflow in Nitro Pro CVSS 3.1HIGH 7.8
  • TI-2020-04941 Use after free in Nitro Pro CVSS 3.1HIGH 8.8
  • TI-2017-05094 Nitro Pro 11.0.3.173 allows remote attackers to execute arbitrary code via saveAs and… CVSS 3.0HIGH 8.8
  • TI-2020-04959 Integer overflow in Nitro Pro CVSS 3.1HIGH 7.8
  • TI-2020-04983 Integer overflow in Nitro Pro CVSS 3.1HIGH 7.8
See all 17 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences