# CVE-2026-120190: PostyBirb Plus Submission Description Editor DescriptionInput.tsx cross site scripting

Status: published. Published: 2026-11-01. Updated: 2026-11-06.

A security flaw has been discovered in PostyBirb Plus up to 3.1.75. Affected by this vulnerability is an unknown functionality of the file ui/src/views/submissions/submission-forms/form-components/DescriptionInput.tsx of the component Submission Description Editor. The manipulation results in cross site scripting. The attack may be performed from remote. The exploit has been released to the public and may be used for attacks. Upgrading to version 3.1.76 addresses this issue. The patch is identified as 6b11c2345ad98ae59fd5404a9f1024eb1d10c8a4. It is advisable to upgrade the affected component.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://github.com/mvdicarlo/postybirb-plus/pull/506
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://github.com/mvdicarlo/postybirb-plus/commit/6b11c2345ad98ae59fd5404a9f1024eb1d10c8a4
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://github.com/mvdicarlo/postybirb-plus/releases/tag/v3.1.76

## Affected products and versions

- n/a / PostyBirb Plus: 3.1.0 (affected); 3.1.1 (affected); 3.1.2 (affected); 3.1.3 (affected); 3.1.4 (affected); 3.1.5 (affected); 3.1.6 (affected); 3.1.7 (affected); 3.1.8 (affected); 3.1.9 (affected); 3.1.10 (affected); 3.1.11 (affected); 3.1.12 (affected); 3.1.13 (affected); 3.1.14 (affected); 3.1.15 (affected); 3.1.16 (affected); 3.1.17 (affected); 3.1.18 (affected); 3.1.19 (affected); 3.1.20 (affected); 3.1.21 (affected); 3.1.22 (affected); 3.1.23 (affected); 3.1.24 (affected); 3.1.25 (affected); 3.1.26 (affected); 3.1.27 (affected); 3.1.28 (affected); 3.1.29 (affected); 3.1.30 (affected); 3.1.31 (affected); 3.1.32 (affected); 3.1.33 (affected); 3.1.34 (affected); 3.1.35 (affected); 3.1.36 (affected); 3.1.37 (affected); 3.1.38 (affected); 3.1.39 (affected); 3.1.40 (affected); 3.1.41 (affected); 3.1.42 (affected); 3.1.43 (affected); 3.1.44 (affected); 3.1.45 (affected); 3.1.46 (affected); 3.1.47 (affected); 3.1.48 (affected); 3.1.49 (affected); 3.1.50 (affected); 3.1.51 (affected); 3.1.52 (affected); 3.1.53 (affected); 3.1.54 (affected); 3.1.55 (affected); 3.1.56 (affected); 3.1.57 (affected); 3.1.58 (affected); 3.1.59 (affected); 3.1.60 (affected); 3.1.61 (affected); 3.1.62 (affected); 3.1.63 (affected); 3.1.64 (affected); 3.1.65 (affected); 3.1.66 (affected); 3.1.67 (affected); 3.1.68 (affected); 3.1.69 (affected); 3.1.70 (affected); 3.1.71 (affected); 3.1.72 (affected); 3.1.73 (affected); 3.1.74 (affected); 3.1.75 (affected); 3.1.76 (unaffected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 5.1 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P; source: CNA: VulDB

- CVSS 3.1: 3.5 (low); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C; source: CNA: VulDB

- CVSS 3.0: 3.5 (low); CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C; source: CNA: VulDB

- CVSS 2.0: 4 (medium); AV:N/AC:L/Au:S/C:N/I:P/A:N/E:POC/RL:OF/RC:C; source: CNA: VulDB

- CVSS 4.0: 2 (low); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: cna@vuldb.com

- CVSS 3.1: 3.5 (low); CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N; source: NVD: cna@vuldb.com

- CVSS 2.0: 4 (medium); AV:N/AC:L/Au:S/C:N/I:P/A:N; source: NVD: cna@vuldb.com

- CISA KEV: No listing in collected sources

- EPSS: 0.39% as of 2026-11-06; percentile 33.48%

- SSVC: exploitation poc; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-79, CWE-94

## Exploit evidence

- exploit: https://github.com/user-attachments/files/32685547/report.md (CNA: VulDB)

## References

- https://vuldb.com/vuln/429529 (CNA: VulDB; vdb-entry)

- https://vuldb.com/vuln/429529/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-120190 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1027356 (CNA: VulDB; third-party-advisory)

- https://github.com/mvdicarlo/postybirb-plus/issues/504 (CNA: VulDB; issue-tracking)

- https://github.com/mvdicarlo/postybirb-plus/pull/506 (CNA: VulDB; issue-tracking, patch)

- https://github.com/user-attachments/files/32685547/report.md (CNA: VulDB; exploit)

- https://github.com/mvdicarlo/postybirb-plus/commit/6b11c2345ad98ae59fd5404a9f1024eb1d10c8a4 (CNA: VulDB; patch)

- https://github.com/mvdicarlo/postybirb-plus/releases/tag/v3.1.76 (CNA: VulDB; patch)

- https://github.com/mvdicarlo/postybirb-plus/commit/6b11c2345ad98ae59fd5404a9f1024eb1d10c8a4 (cna@vuldb.com)

- https://github.com/mvdicarlo/postybirb-plus/issues/504 (cna@vuldb.com)

- https://github.com/mvdicarlo/postybirb-plus/pull/506 (cna@vuldb.com)

- https://github.com/mvdicarlo/postybirb-plus/releases/tag/v3.1.76 (cna@vuldb.com)

- https://github.com/user-attachments/files/32685547/report.md (cna@vuldb.com)

- https://vuldb.com/cve/CVE-2026-120190 (cna@vuldb.com)

- https://vuldb.com/submit/1027356 (cna@vuldb.com)

- https://vuldb.com/vuln/429529 (cna@vuldb.com)

- https://vuldb.com/vuln/429529/cti (cna@vuldb.com)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-120190; retrieved 2026-11-06; source updated 2026-11-06

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-120190; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-120190; retrieved 2026-11-06; source updated Not reported

Revision: 540b854219b59bae98778576bc86542a0f69482d6b2683c64eb0dbc658703416

Canonical: https://y2.dev/cve/CVE-2026-120190

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