CVE-2023-27379Public exploitNetwork attack vector

Code execution via Calculate-event object reuse

Published Jul 19, 2023 · Updated Aug 2, 2024

Use-after-free in Foxit PDF Reader 12.1.2.15332 allows remote attackers to execute arbitrary code through a crafted PDF. A field Calculate action calls deletePages repeatedly, freeing page-associated JavaScript objects that the event path later reuses without validation. Exploitation requires a user to open the document, or to visit a malicious site when the browser plugin extension is enabled, and code runs in the user's context.

CVSS severity8.8
High
EPSS probability1.05%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Foxit PDF Reader 12.1.2.15332 allows remote attackers to execute arbitrary code through a crafted PDF. A field Calculate action calls deletePages repeatedly, freeing page-associated JavaScript objects that the event path later reuses without validation. Exploitation requires a user to open the document, or to visit a malicious site when the browser plugin extension is enabled, and code runs in the user's context.

The record

CVE
CVE-2023-27379
Published
Jul 19, 2023
Updated
Aug 2, 2024
Vendor
Foxit Software
Product
Foxit PDF Reader
Classifications
CWE-416, T1203, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 19, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=12.1.2.15332

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Foxit Software · Foxit PDF Readerversion=12.1.2.15332

Published CVSS scores

8.8Cisco TalosCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free
T1203Exploitation for Client Execution
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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