TI-2023-12032 Aliases CVE-2023-27294 GHSA-85f4-cmhq-rx89

Cross-site scripting in OpenCATS

MEDIUM 60CWE-79Published 2023-02-28 · Updated 2025-03-21

Key facts

Attack vector: Network
Privileges required: Low
User interaction: Required
Attack complexity: Low
Impact type: Cross-site scripting
Confidentiality · integrity · availability: Low · Low · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-79.

Summary

Improper neutralization of input during web page generation allows an authenticated attacker with access to a restricted account to submit malicious Javascript as the description for a calendar event, which would then be executed in other users' browsers if they browse to that event. This could result in stealing session tokens from users with higher permission levels or forcing users to make actions without their knowledge.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.0053 45th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Total

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
—	OpenCATS	0.9.6	—	No fix listed	CNA

OpenCATS Vendor— Affected 0.9.6 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:opencats:opencats:0.9.6:::::::*	0.9.6	Vulnerable	opencats

cpe:2.3:a:opencats:opencats:0.9.6:*:*:*:*:*:*:* Versions 0.9.6 Vulnerable ·opencats

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2023-27294
2026-10-03 Alias added: GHSA-85f4-cmhq-rx89

References

Exploit 1

https://www.tenable.com/security/research/tra-2023-8

TI-2023-12031 Cross-site scripting in OpenCATS CVSS 3.1MEDIUM 6.1
TI-2023-12030 Open redirect in OpenCATS CVSS 3.1MEDIUM 5.4
TI-2023-12033 Cross-site request forgery in OpenCATS CVSS 3.1MEDIUM 5.4
TI-2021-18297 OpenCATS through 0.9.6 allows remote attackers to execute arbitrary code by uploading an… CVSS 3.1CRITICAL 9.8
TI-2021-07541 OpenCATS through 0.9.5-3 unsafely deserializes index.php?m=activity requests, leading to… CVSS 3.1CRITICAL 9.8
TI-2022-20980 OpenCATS v0.9.6 was discovered to contain a remote code execution (RCE) vulnerability via… CVSS 3.1CRITICAL 9.8

See all 23 →

Sources

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