Security readout for executives and security teams
Plain-English summary
This issue concerns Bitwarden auto-filling passwords inside cross-domain iframes in versions through 2023.2.1. In some page designs, credentials could be exposed outside the expected website context. The vendor noted legitimate cross-domain iframe use cases and that auto-fill on page load is not enabled by default.
Executive priority
Prioritize as a high credential exposure risk if Bitwarden is used at scale or by privileged staff. Urgency depends on whether auto-fill on page load is enabled and whether deployed clients are within the named version range.
Technical view
CVE-2018-25081 is a CWE-200 information exposure issue with CVSS 3.1 score 7.5. The CVE states Bitwarden through 2023.2.1 can auto-fill within a cross-domain iframe. The provided sources do not identify a specific fixed version, affected CPEs, or active exploitation.
Likely exposure
Exposure is most plausible for organizations using Bitwarden clients through 2023.2.1 where auto-fill on page load is enabled. Default-disabled behavior reduces broad exposure, but managed browser extension configurations should be checked.
Exploitation context
The bundle includes public research references, but KEV is false and no cited source in the bundle establishes active exploitation. Treat this as a credential disclosure risk requiring configuration and version validation, not as confirmed in-the-wild compromise.
Researcher notes
Evidence is limited to the CVE description, CVSS metadata, and referenced public materials. The structured affected list is n/a, so product and version scoping should rely on vendor release guidance and local inventory before asserting exposure.
Mitigation direction
- Check Bitwarden vendor release guidance for the applicable fixed or recommended client version.
- Update Bitwarden clients beyond versions named as affected where vendor guidance supports it.
- Keep auto-fill on page load disabled unless a documented business need exists.
- Review managed browser extension policies for forced auto-fill behavior.
- Educate users to avoid saving credentials on untrusted or unexpected domains.
Validation and detection
- Inventory Bitwarden desktop, browser extension, and web client versions in use.
- Confirm whether auto-fill on page load is enabled by users or policy.
- Review password manager policies for cross-domain iframe handling controls.
- Prioritize validation for privileged users and shared administrator workstations.
- Check vendor advisories or release notes before closing the finding.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-25081 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/bitwarden/clients/releasesCVE reference
- https://flashpoint.io/blog/bitwarden-password-pilfering/CVE reference
- https://cdn.bitwarden.net/misc/Bitwarden%20Security%20Assessment%20Report.pdfCVE reference
- https://news.ycombinator.com/item?id=35075861CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.