CVE-2023-22899

Exp

Zip4j through 2.11.2, as used in Threema and other products, does not always check the MAC when decrypting a ZIP archive.

Published: 2023-01-10 Last update: 2025-04-09 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-22899 is rated Exploit Available (55.9/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.26%). 2 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-2023-22899

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

Exploit prediction scoring system (EPSS) score for CVE-2023-22899

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 2026-01-28 0.17% 0.26% +0.09%
2 2025-11-21 0.25% 0.17% -0.08%
3 2025-11-18 — 0.25% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-22899

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 3.6 [email protected]
5.9 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2023-22899

GitHub Security Advisory for CVE-2023-22899

GHSA-2pj2-gchf-wmw7 · Severity: medium · Ecosystem: maven — Zip4j Origin Validation Error

OS Trackers for CVE-2023-22899

vendor priority summary link
debian not yet assigned CVE-2023-22899 not yet assigned priority: Debian including 1 source packages (zip4j), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 4, open 1. https://security-tracker.debian.org/tracker/CVE-2023-22899
redhat medium — https://access.redhat.com/security/cve/CVE-2023-22899
ubuntu medium CVE-2023-22899 medium priority: Ubuntu including 1 source packages (zip4j), 13 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 7, needs-triage 5, DNE 1. https://ubuntu.com/security/CVE-2023-22899

Affected software / configurations for CVE-2023-22899

Vendor Product Version Raw CPE
zip4j_project zip4j <= 2.11.2 cpe:2.3:a:zip4j_project:zip4j:*:*:*:*:*:*:*:*

References for CVE-2023-22899

URL Tags
https://breakingthe3ma.app Third Party Advisory
https://breakingthe3ma.app/files/Threema-PST22.pdf Exploit Technical Description Third Party Advisory
https://github.com/srikanth-lingala/zip4j/issues/485 Exploit Issue Tracking Patch Third Party Advisory
https://github.com/srikanth-lingala/zip4j/releases Release Notes Third Party Advisory
https://news.ycombinator.com/item?id=34316206 Third Party Advisory
https://threema.ch/en/blog/posts/news-alleged-weaknesses-statement Vendor Advisory
cvelogic Threat Intelligence