Vulnerability in Gonitro Nitro Pro

CVE-2021-21798

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.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.214 (97.6th percentile), scored .

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-21798: rose from 0.160 to 0.214.

EPSS over last 30 days · oldest: 0.160 · newest: 0.214 · change: +0.053

Affected products

  • Gonitro Nitro Pro — versions 13.31.0.605, 13.33.2.645
  • Nitro Pro — versions Nitro Pro 13.31.0.605 , Nitro Pro 13.33.2.645

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2021-21798?
CVE-2021-21798 is a high-severity vulnerability in Gonitro Nitro Pro, classified under CWE-562. CVSS score: 7.8/10. Published 2021-09-15.
How severe is CVE-2021-21798?
High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2021-21798 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.