CVE-2021-30469Public exploit

Application crash via freed object access

Published May 26, 2021 · Updated Aug 3, 2024

Use-after-free in PoDoFo 0.9.7 allows local users to crash a PDF-processing application through a crafted PDF file. PdfVecObjects::Clear accesses heap memory after it has been freed while podofoencrypt processes the malformed document. The file must be processed by an application using the affected library; the documented consequence is an application crash, not data access or modification.

CVSS severity5.5
Medium
EPSS probability0.70%
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 PoDoFo 0.9.7 allows local users to crash a PDF-processing application through a crafted PDF file. PdfVecObjects::Clear accesses heap memory after it has been freed while podofoencrypt processes the malformed document. The file must be processed by an application using the affected library; the documented consequence is an application crash, not data access or modification.

The record

CVE
CVE-2021-30469
Published
May 26, 2021
Updated
Aug 3, 2024
Vendor
PoDoFo Project
Product
PoDoFo
Classifications
CWE-416, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=PoDoFo 0.9.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

PoDoFo Project · PoDoFoversion=PoDoFo 0.9.7

Published CVSS scores

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/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.

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No observations available

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

Weakness, pattern, technique

CWE-416Use After Free
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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