CVSS v3
7.8
HIGH
EPSS Score
73.4%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
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.
Active exploitation of CVE-2021-21797 has not been confirmed. The EPSS score is 73.4%, indicating the estimated probability of exploitation in the next 30 days.
CVE-2021-21797 has a CVSS v3 base score of 7.8 (HIGH severity).
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Ranked by exploit probability (EPSS).