CVE-2019-25025: rubyonrails active_record_session_store
Vulnerability summary
CVE-2019-25025 is a medium (CVSS 5.3) vulnerability in rubyonrails active_record_session_store. EPSS estimates a 1.84% chance of exploitation in the next 30 days, higher than 78.9% of scored vulnerabilities.
Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 4 · Related 3Timeline
- 05-03-2021PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
The activerecord-session_store (aka Active Record Session Store) component through 1.1.3 for Ruby on Rails does not use a constant-time approach when delivering information about whether a guessed session ID is valid. Consequently, remote attackers can leverage timing discrepancies to achieve a correct guess in a relatively short amount of time. This is a related issue to CVE-2019-16782.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- OSV · RubygemsEcosystem advisory · calculated5.3MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS trend
Probability
1.84%
Chance of exploitation in the next 30 days
Percentile
79%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.84% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
RubyGems1 product
- activerecord-session_store< 2.0.0
Rubyonrails1 product
- active_record_session_store≤ 1.1.3
Ubuntu1 product
- ruby-activerecord-session-storeAll versions (No fix recorded)
3 vendors · 3 products
References
9 links- github.com/rails/activerecord-session_store/pull/151X Refsource MISCREPORTWEBPatchThird Party Advisory
