CVE-2021-21796

HIGHCVSS 7.8/10EPSS 15.78%

Last modified

CVE-2021-21796 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 15.78% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability
15.78%

96.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
GonitroNitro Pro13.31.0.605
GonitroNitro Pro13.33.2.645

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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.
How severe is CVE-2021-21796?
CVE-2021-21796 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 15.78% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21796?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21796?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST