CVE-2024-45216 Apache Solr
| Affected software | Apache Solr |
|---|---|
| Severity | 9.8 Critical CVSS 3.1 |
| Fixed in | 8.11.4, 9.7.0 |
| Weakness | Improper authentication (CWE-287) |
| Published | 16 Oct 2024 |
| Updated | 17 Jun 2026 |
Description
Improper Authentication vulnerability in Apache Solr. Solr instances using the PKIAuthenticationPlugin, which is enabled by default when Solr Authentication is used, are vulnerable to Authentication bypass. A fake ending at the end of any Solr API URL path, will allow requests to skip Authentication while maintaining the API contract with the original URL Path. This fake ending looks like an unprotected API path, however it is stripped off internally after authentication but before API routing. This issue affects Apache Solr: from 5.3.0 before 8.11.4, from 9.0.0 before 9.7.0. Users are recommended to upgrade to version 9.7.0, or 8.11.4, which fix the issue.
CWE-863 · Incorrect authorization
Exploitation status
Exploited
Real-world exploitation reported by VulnCheck KEV. CISA has not confirmed it.
Exploitation status
- CISA KEV not listed
- VulnCheck KEV listed Exploitation reported in the wild. Honeypot sightings · 2 exploits · earliest 2025-10-31.
- CISA Vulnrichment exploitation: none
- Indexed PoC 2 indexed Published artifacts you can open, in GitHub PoC, Nuclei; first seen 2024-12-02.
- EPSS 93% chance in 30 days A model's forecast, not a report of exploitation. Higher than 99.8% of all scored CVEs.
VulnCheck KEV
Exploitation evidence from VulnCheck Known Exploited Vulnerabilities (VulnCheck KEV), used under VulnCheck's community terms. View CVE-2024-45216 in VulnCheck (free account).
| Evidence | Source | Detail | Date |
|---|---|---|---|
| Honeypot sighting | VulnCheck canaries | Exploitation attempts seen on 69 days | 2025-10-31 to 2026-11-12 |
| Exploit reference | VulnCheck XDB af21f10d397e | Exploit type: infoleak | 2024-12-02 |
| Exploit reference | VulnCheck XDB 7db76efe6985 | Exploit type: infoleak | 2025-01-10 |
| Index | Artifact | Stars | First seen |
|---|---|---|---|
| GitHub PoC | congdong007/CVE-2024-45216-Poc | 2 | 2024-12-02 |
| Nuclei | Apache Solr - Authentication Bypass |
Waratek protection
A kind of vulnerability Waratek's rules address, with exploit code published or exploitation reported. No rule exists and none is planned yet. The decision below says what we found to build a rule from.
- Protection none
- Action unverified
- Review automated Inferred
- Record active
| Decided by | The affected package being open source on Maven, so the fix can be read |
|---|---|
| Finding | This CVE affects an open-source Java library published on Maven Central (Maven packages: org.apache.solr:solr), so it is squarely in ARMR's territory and the source needed to understand the defect is public. That makes it a candidate for an ARMR patch rule. No rule exists and none is scheduled: the diff between the affected and fixed versions has not been read, and a closer look may find no hook point ARMR can act on. |
Affected software and releases
Maven packages
Affected and fixed versions, from OSV.dev| Package | Introduced | Fixed | Last affected |
|---|---|---|---|
org.apache.solr:solr |
5.3.0 | 8.11.4 |
unbounded |
org.apache.solr:solr |
9.0.0 | 9.7.0 |
unbounded |
References
Timeline
Timeline
| Published | 2024-10-16 | By the CVE Program. |
|---|---|---|
| VulnCheck KEV: earliest evidence | 2025-10-31 | Date of the oldest evidence of exploitation in VulnCheck KEV's record. VulnCheck does not publish the date it listed the CVE. |
| NVD record modified | 2026-06-17 | NVD's own last-modified date for this record. |
| VulnCheck KEV: latest evidence | 2026-11-12 | Date of the newest report, exploit reference or honeypot sighting in VulnCheck KEV's record. |