[UPDATE] [medium] Apache Commons: Vulnerability Enables Denial of Service

mediumCVE-2023-42503

A remote, anonymous attacker can exploit a vulnerability in Apache Commons to conduct a denial of service attack.

CSIRTS triage

vendor: Apache Commons product: Apache Commons Denial of service

What: A vulnerability in Apache Commons enables remote denial-of-service attacks.
Who is affected: Networked systems running vulnerable Apache Commons versions.
Urgency: Medium; remote exploitation possible but limited to availability impact.
Action: Update Apache Commons to patched version addressing CVE-2023-42503.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-08-12
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2023-2352

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2023-425030.49% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 40% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2023-42503	coverage & exploitation status	NVD · CVE.org

Recent advisories for Apache Commons

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

medium[UPDATE] [medium] Apache Commons: Vulnerability allows Denial of Servicecert-bund · 2026-08-24
medium[UPDATE] [medium] Apache Commons: Multiple Vulnerabilities Enable Denial of Servicecert-bund · 2026-08-12
high[UPDATE] [high] Apache Commons BeanUtils: Vulnerability allows bypassing security measurescert-bund · 2026-08-03
medium[UPDATE] [medium] Apache Commons Beanutils: Vulnerability allows bypassing security precautionscert-bund · 2026-08-03
low[UPDATE] [low] Apache Commons Lang: Vulnerability allows denial of servicecert-bund · 2026-07-29
unknownUSN-8322-2: Apache Commons BeanUtils regressionubuntu · 2026-07-23