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TI-2026-03904 Aliases CVE-2026-4494GHSA-9wm2-388x-gpfx

atjiu pybbs TopicApiController.java create cross site scripting

Priority MEDIUM 56CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting, Code execution
Confidentiality · integrity · availability
None · Low · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79 and CWE-94.

Summary

A vulnerability was identified in atjiu pybbs 6.0.0. This affects the function create of the file src/main/java/co/yiiu/pybbs/controller/api/TopicApiController.java. The manipulation leads to cross site scripting. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00307 23rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
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
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
atjiupybbs6.0.0—No fix listedCNA
  • pybbs Vendoratjiu Affected 6.0.0 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:pybbs_project:pybbs:*:*:*:*:*:*:*:*——atjiu
  • cpe:2.3:a:pybbs_project:pybbs:*:*:*:*:*:*:*:* Versions — — ·atjiu

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-4494
  2. 2026-10-03 Alias added: GHSA-9wm2-388x-gpfx

References

Exploit 1

  • TI-2025-07827 atjiu pybbs Email Verification improper authorization CVSS 4.0MEDIUM 6.9
  • TI-2025-07826 atjiu pybbs Verification Code login Captcha CVSS 4.0MEDIUM 6.9
  • TI-2025-07829 atjiu pybbs UserAdminController.java update weak password CVSS 4.0MEDIUM 6.3
  • TI-2025-07828 atjiu pybbs Registered Email SettingsApiController.java sendEmailCode information exposure CVSS 4.0MEDIUM 6.3
  • TI-2025-11280 atjiu pybbs UserApiController.java information disclosure CVSS 4.0MEDIUM 5.3
  • TI-2025-08065 atjiu pybbs CookieUtil.java setCookie cross-site request forgery CVSS 4.0MEDIUM 5.3
See all 17 →

Sources

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