Rack provides an interface for developing web applications in Ruby. Prior to versions 2.2.11, 3.0.12, and 3.1.10, Rack::CommonLogger can be exploited by crafting input that includes newline characters to manipulate log entries. The supplied proof-of-concept demonstrates injecting malicious content into logs. When a user provides the authorization credentials via Rack::Auth::Basic, if success, the username will be put in env['REMOTE_USER'] and later be used by Rack::CommonLogger for logging purposes. The issue occurs when a server intentionally or unintentionally allows a user creation with the username contain CRLF and white space characters, or the server just want to log every login attempts. If an attacker enters a username with CRLF character, the logger will log the malicious username with CRLF characters into the logfile. Attackers can break log formats or insert fraudulent entries, potentially obscuring real activity or injecting malicious data into log files. Versions 2.2.11, 3.0.12, and 3.1.10 contain a fix.
CVE-2025-25184
This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 1.3%, top 20% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS v3
- 6.5
- EG Score
- 6.5(medium)
- EG Risk
- —
- EPSS
- 63.3%
- KEV
- Not listed
Published
February 12, 2025
Last Modified
November 3, 2025
References (3)
- security-advisories@githubhttps://github.com/rack/rack/commit/074ae244430cda05c27ca91cda699709cfb3ad8e
- security-advisories@githubhttps://github.com/rack/rack/security/advisories/GHSA-7g2v-jj9q-g3rg
- af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/03/msg00016.html
Vendor Advisories for CVE-2025-25184(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Patch Availability(4)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | ruby-rack (2.2.7-1ubuntu0.2) @ noble | 2026-05-30 | ubuntu |
| ubuntu | ruby-rack (2.2.7-1.1ubuntu0.25.04.2) @ plucky | 2026-05-30 | ubuntu |
| redhat | pcs-0:0.11.9-2.el9 | 2025-05-13 | redhat |
| redhat | openshift-logging/vector-rhel9:v0.34.1-33 | 2025-03-05 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(1 across 1 ecosystem)
RubyGems(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| rack | 3.1.0 ... 3.1.9 (10 versions) | 3.1.10 | — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(3)
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
Data Freshness Timeline
(refreshed 10× in last 7d / 44× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-22 14:07 UTCEPSS rescore
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- 2026-07-07 10:51 UTCOSV refresh
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- 2026-06-18 22:05 UTCOSV refresh
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- 2026-05-30 11:47 UTCEG score recompute
- 2026-05-30 11:47 UTCVendor advisory
- 2026-05-30 07:59 UTCOSV refresh
- 2026-05-29 13:44 UTCEPSS rescore
Related CVEs(same vendor + same CWE)
Same vendor
10 shownredhat
Same CWE
10 shownCWE-117 · CWE-93
Frequently asked(5)
What is CVE-2025-25184?
When was CVE-2025-25184 disclosed?
Is CVE-2025-25184 actively exploited?
What is the CVSS score of CVE-2025-25184?
How do I remediate CVE-2025-25184?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-25184
Is Your Infrastructure Affected by CVE-2025-25184?
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