CVE-2026-2861

Foswiki Changes/Viewfile/Oops information disclosure

Assigner: VulDB
Reserved: 20.02.2026 Published: 21.02.2026 Updated: 21.02.2026

A vulnerability was detected in Foswiki up to 2.1.10. The affected element is an unknown function of the component Changes/Viewfile/Oops. The manipulation results in information disclosure. It is possible to launch the attack remotely. The exploit is now public and may be used. Upgrading to version 2.1.11 is sufficient to fix this issue. The patch is identified as 31aeecb58b64/d8ed86b10e46. Upgrading the affected component is recommended.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
CVSS Score: 6.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C
CVSS Score: 5.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

CVSS Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C
CVSS Score: 5.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.0

CVSS Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:OF/RC:C
CVSS Score: 5

Access Vector	Network	Confidentiality Impact	Partial
Access Complexity	Low	Integrity Impact	None
Authentication	None	Availability Impact	None

CVSS 2.0

Product Status

Vendor	n/a
Product	Foswiki
Versions	Version 2.1.0 is affected Version 2.1.1 is affected Version 2.1.2 is affected Version 2.1.3 is affected Version 2.1.4 is affected Version 2.1.5 is affected Version 2.1.6 is affected Version 2.1.7 is affected Version 2.1.8 is affected Version 2.1.9 is affected Version 2.1.10 is affected Version 2.1.11 is unaffected

Vendor

n/a

Product

Foswiki

Versions

Version 2.1.0 is affected
Version 2.1.1 is affected
Version 2.1.2 is affected
Version 2.1.3 is affected
Version 2.1.4 is affected
Version 2.1.5 is affected
Version 2.1.6 is affected
Version 2.1.7 is affected
Version 2.1.8 is affected
Version 2.1.9 is affected
Version 2.1.10 is affected
Version 2.1.11 is unaffected

Credits

Jan Seebens finder
Michael Daum finder
Michael Daum (VulDB User) reporter

References

Problem Types