Summary iPlain-English security verdict for Apache Solr, generated from its current health score, actively-exploited vulnerabilities, and latest supported version.
Apache Solr currently scores 0/100 — critical, with active exploitation. 3 of its known vulnerabilities are being actively exploited in the wild (CISA KEV), including CVE-2023-44487. Upgrade immediately and review your exposure to the actively-exploited CVEs below.
Disclosure trend iNew CVEs published for Apache Solr each year (NVD). A higher bar means more disclosures that year — more scrutiny, not necessarily less safe.
Patch priority — what to act on iThe issues to fix first — actively exploited (CISA KEV) first, then by exploitation probability (EPSS), then severity. Each row's "→ fixed in" is the earliest version that patches it; "see advisory" means no fixed version is published.
Most urgent first — actively exploited, then likeliest to be exploited.
CVE-2023-44487 HIGH exploited Uncontrolled resource consumption EPSS 100% → fixed in 9.4.0 CVE-2019-17558 HIGH exploited Injection EPSS 99% → fixed in 8.4.0 CVE-2019-0193 HIGH exploited Code injection EPSS 84% → fixed in 8.1.2 CVE-2021-27905 CRITICAL Server-side request forgery (SSRF) EPSS 93% → fixed in 8.8.2 CVE-2017-12629 CRITICAL XML external entity (XXE) EPSS 92% → see advisory CVE-2024-45216 CRITICAL Improper authentication EPSS 91% → fixed in 9.7.0 CVE-2023-50386 HIGH Unrestricted file upload EPSS 84% → fixed in 9.4.1 CVE-2020-13957 CRITICAL Incorrect authorization EPSS 79% → see advisory CVE-2020-27223 MEDIUM CWE-407 EPSS 78% → see advisory CVE-2019-0192 CRITICAL Insecure deserialization EPSS 78% → see advisory CVE-2023-50290 MEDIUM Information disclosure EPSS 69% → fixed in 9.3.0 CVE-2013-6397 MEDIUM Path traversal EPSS 56% → see advisoryGet alerted about Apache Solr
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Frequently asked
Is Apache Solr safe and patched?
Apache Solr currently scores 0/100 — critical, with active exploitation. 3 of its known vulnerabilities are being actively exploited in the wild (CISA KEV), including CVE-2023-44487. Upgrade immediately and review your exposure to the actively-exploited CVEs below.
What should I do about Apache Solr now?
Review the patch-priority list, apply the available fixes (or move to the latest release), and confirm against Apache's official advisory. Some issues are under active exploitation, so treat this as urgent.
lifecycle unknown — needs latest supported version
Informational only, from public data (NVD · CISA KEV · EPSS · endoflife.date), and can lag or miss vendor-specific fixes. Always confirm against Apache's official advisory before you patch or upgrade — Apache Solr official site ↗