Double Free in Gonitro Nitro Pro

CVE-2021-21797

An exploitable double-free vulnerability exists in the JavaScript implementation of Nitro Pro PDF. A specially crafted document can cause a reference to a timeout object to be stored in two different places. When closed, the document will result in the reference being released twice. This can lead to code execution under the context of the application. An attacker can convince a user to open a document to trigger this vulnerability.

Vulnerability class: Double Free

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: 0.150 (96.7th percentile), scored .

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.7% 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-2021-21797: held from 0.150 to 0.150.

EPSS over last 30 days · oldest: 0.150 · newest: 0.150 · change: 0.000

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-2021-21797?
CVE-2021-21797 is a high-severity vulnerability in Gonitro Nitro Pro, classified under Double Free. CVSS score: 7.8/10. Published 2021-10-18.
How severe is CVE-2021-21797?
High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2021-21797 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.