TI-2026-02457 Aliases CVE-2026-2861 GHSA-7fj8-2w2v-gvp9

Foswiki Changes/Viewfile/Oops information disclosure

HIGH 70CWE-200Published 2026-02-21 · Updated 2026-03-16

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Information disclosure, Security bypass
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-200 and CWE-284.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00518 44th percentileScored 2026-11-07

Fix Fixed Foswiki: 2.1.11

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	Foswiki	2.1.0; 2.1.1; 2.1.2; 2.1.3; 2.1.4; 2.1.5; 2.1.6; 2.1.7; 2.1.8; 2.1.9; 2.1.10	2.1.11	Patch available	CNA

Foswiki Vendor— Affected 2.1.0; 2.1.1; 2.1.2; 2.1.3; 2.1.4; 2.1.5; 2.1.6; 2.1.7; 2.1.8; 2.1.9; 2.1.10 Fixed in 2.1.11 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:foswiki:foswiki::::::::	before 2.1.11	Vulnerable	Foswiki

cpe:2.3:a:foswiki:foswiki:*:*:*:*:*:*:*:* Versions before 2.1.11 Vulnerable ·Foswiki

Remediation

Fix · CNA Foswiki Fixed in 2.1.11

Timeline

2026-10-02 Threatist record created from CVE-2026-2861
2026-10-03 Alias added: GHSA-7fj8-2w2v-gvp9
2026-10-25 EPSS moved to the below the 50th percentile

References

Patch 1

https://github.com/foswiki/distro/commit/31aeecb58b64

Other 2

TI-2023-16672 An issue in the SpreadSheetPlugin component of Foswiki v2.1.7 and below allows attackers… CVSS 3.1HIGH 7.5
TI-2012-05141 The localization functionality in TWiki before 5.1.3, and Foswiki 1.0.x through 1.0.10… CVSS 2.0MEDIUM 5.0
TI-2013-01463 Foswiki before 1.1.8 contains a code injection vulnerability in the MAKETEXT macro. CVSS 3.1CRITICAL 9.8
TI-2023-10259 Insufficient parameter validation in the Foswiki::Sandbox component of Foswiki v2.1.7 and… CVSS 3.1HIGH 7.5
TI-2010-03968 UI/Manage.pm in Foswiki 1.1.0 and 1.1.1 allows remote authenticated users to gain… CVSS 2.0MEDIUM 6.5
TI-2009-01358 Cross-site request forgery (CSRF) vulnerability in Foswiki before 1.0.5 allows remote… CVSS 2.0MEDIUM 6.8

See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences