TI-2023-12031 Aliases CVE-2023-27293 GHSA-hc89-xf9q-xh2p

Cross-site scripting in OpenCATS

MEDIUM 63CWE-79Published 2023-02-28 · Updated 2025-03-21

Key facts

Attack vector: Network
Privileges required: None
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 unauthenticated attacker to submit malicious Javascript as the answer to a questionnaire which would then be executed when an authenticated user reviews the candidate's submission. This could be used to steal other users’ cookies and force users to make actions without their knowledge.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.57043 99th 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-2023-27293
2026-10-03 Alias added: GHSA-hc89-xf9q-xh2p

References

Exploit 1

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

TI-2023-12032 Cross-site scripting in OpenCATS CVSS 3.1MEDIUM 5.4
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