CVE-2021-30472

Exp

A flaw was found in PoDoFo 0.9.7. A stack-based buffer overflow in PdfEncryptMD5Base::ComputeOwnerKey function in PdfEncrypt.cpp is possible because of a improper check of the keyLength value.

Published: 2021-05-26 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-30472 is rated High Exploit Risk (60.6/100): CVSS High severity, with low exploitation likelihood (EPSS 0.19%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2021-30472

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2021-30472

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-10-26 0.28% 0.19% -0.09%
2 2025-03-30 0.64% 0.28% -0.35%
3 2025-03-29 — 0.64% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-30472

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2021-30472

OS Trackers for CVE-2021-30472

vendor priority summary link
alpine high CVE-2021-30472: 1 source package rows (podofo); 2 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 2. https://security.alpinelinux.org/vuln/CVE-2021-30472
debian not yet assigned CVE-2021-30472 not yet assigned priority: Debian including 1 source packages (libpodofo), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. https://security-tracker.debian.org/tracker/CVE-2021-30472
suse high CVE-2021-30472 severity important: SUSE including 2 source package names (libpodofo0_9_2, podofo), 2 product×package rows across 1 product lines (SUSE Linux Enterprise Workstation Extension 12 SP5): Will Not Fix 2. https://www.suse.com/security/cve/CVE-2021-30472/
ubuntu medium CVE-2021-30472 medium priority: Ubuntu including 1 source packages (libpodofo), 16 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 8, needs-triage 8. https://ubuntu.com/security/CVE-2021-30472

Affected software / configurations for CVE-2021-30472

Vendor Product Version Raw CPE
podofo_project podofo 0.9.7 cpe:2.3:a:podofo_project:podofo:0.9.7:*:*:*:*:*:*:*

References for CVE-2021-30472

URL Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1947458 Exploit Issue Tracking Patch Third Party Advisory
cvelogic Threat Intelligence