Use After Free in Gonitro Nitro Pro
CVE-2021-21796
An exploitable use-after-free vulnerability exists in the JavaScript implementation of Nitro Pro PDF. A specially crafted document can cause an object containing the path to a document to be destroyed and then later reused, resulting in a use-after-free vulnerability, which 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: Use-After-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: 0.158 (96.9th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.158 · newest: 0.158 · 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
- talosintelligence.com/vulnerability_reports/TALOS-2021-1265 (Exploit, Third Party Advisory, Mitigation)
Frequently asked questions
- What is CVE-2021-21796?
- CVE-2021-21796 is a high-severity vulnerability in Gonitro Nitro Pro, classified under Use After Free. CVSS score: 7.8/10. Published 2021-10-18.
- How severe is CVE-2021-21796?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2021-21796 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.