Bitwarden through 2023.2.1 offers password auto-fill within a cross-domain IFRAME element.

published 2023-03-08 3 y ago modified 2026-06-17 4 mo ago also EUVD-2018-13837

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.0%; EPSS 1.0% chance of exploitation in 30 days, percentile 63%
public exploits: 0; none known

Bitwarden through 2023.2.1 offers password auto-fill within a cross-domain IFRAME element. NOTE: the vendor's position is that there have been important legitimate cross-domain configurations (e.g., an apple.com IFRAME element on the icloud.com website) and that "Auto-fill on page load" is not enabled by default.

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 2 y ago (2024-08-19)

Exploit prediction

1.03% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

flashpoint.io https://flashpoint.io/blog/bitwarden-password-pilfering/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

bitwarden bitwarden

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

flashpoint.io /blog/bitwarden-password-pilfering/
exploit, third-party-advisory
cdn.bitwarden.net /misc/Bitwarden%20Security%20Assessment%20Report.pdf
technical-description, vendor-advisory
github.com /bitwarden/clients/releases
release-notes
news.ycombinator.com /item?id=35075861
third-party-advisory

Sources

CVE List CVE-2018-25081
NVD CVE-2018-25081

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary