CVE-2026-83555

Description

The Email Subscribers & Newsletters WordPress plugin before 5.9.35 does not verify the per-subscriber management token before changing a subscriber's subscription status, allowing unauthenticated users to force-unsubscribe or force-confirm an arbitrary subscriber whose email address they know.

Overview

State: PUBLISHED
Assigner (CNA): WPScan
CVSS severity: —
CVSS score: —
CVSS vector: —
Effective score: 5.3 / 10 MEDIUM source: NVD
CWE(s): CWE-862 Missing Authorization
Reserved: 2026-08-31
Published: 2026-09-23 06:00 UTC
Last updated: 2026-09-23 10:58 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/83xxx/CVE-2026-83555.json

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-23 06:17:02 UTC
NVD last modified: 2026-09-23 18:13:31 UTC
NVD CVSS v3.1: 5.3 / 10 MEDIUM source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Exploitability subscore: 3.9 / 10
Impact subscore: 1.4 / 10
EPSS score: 0.0019 (probability of exploitation in next 30 days)
EPSS percentile: 8.46% vs all CVEs — higher = more likely to be exploited, as of 2026-09-23

NVD-assigned CWE(s): CWE-862 (differs from the CNA list above)

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-85031
Assigner: WPScan
Published: Sep 23, 2026, 6:00:16 AM
Updated: Sep 23, 2026, 10:58:36 AM
EUVD base score (CVSS 3.1): 5.3 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EUVD-reported EPSS: 0.1900
Vendors: Unknown
Products: Email Subscribers & Newsletters (0 <5.9.35)
Aliases: GHSA-52g9-h9fh-xgf2

ENISA description: The Email Subscribers & Newsletters WordPress plugin before 5.9.35 does not verify the per-subscriber management token before changing a subscriber's subscription status, allowing unauthenticated users to force-unsubscribe or force-confirm an arbitrary subscriber whose email address they know.

EUVD references (1)

https://wpscan.com/vulnerability/54cb2a98-7860-40dd-817e-1294317084aa/

Affected products (1)

Vendor	Product	Versions	Platforms
Unknown	Email Subscribers & Newsletters	`0` (affected)	—

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

https://wpscan.com/vulnerability/54cb2a98-7860-40dd-817e-1294317084aa/ exploitvdb-entrytechnical-description

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (1)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://wpscan.com/vulnerability/54cb2a98-7860-40dd-817e-1294317084aa/ contact@wpscan.com

Remediations (10)

September 2026 Patch Breaks RDS: Fix Without Rolling Back

web:byteiota.com

That's not all. September's Patch Tuesday also fixed two zero-days under active exploitation: CVE - 2026 -85880, a heap buffer overflow in Windows ALPC that allows local privilege escalation to SYSTEM, and CVE - 2026 -81963, a link-following flaw in the Windows Update Stack. Rolling back removes those fixes too.

2026-09-24 11:50 UTC
Pennsylvania Access To Criminal History - Home - pa

web:epatch.pa.gov

Why does PATCH exist? Its purpose is to better enable the public to obtain criminal history record checks. The repository was created and is maintained in accordance with Pennsylvania's Criminal History Information Act contained in Chapter 91 of Title 18, Crimes Code. This Act also directs the Pennsylvania State Police (PSP) to disseminate criminal history data to criminal justice agencies ...

2026-09-24 11:50 UTC
NVD - Home

web:nvd.nist.gov

NVD - Home ... NVD - Home

2026-09-24 11:50 UTC
Patch - Everything Local: Breaking News, Events, Discussions

web:patch.com

The best breaking news, stories, and events from the Patch network of local news sites

2026-09-24 11:50 UTC
Tuscaloosa News, Breaking News in Tuscaloosa, AL - Patch

web:patch.com

Tuscaloosa Latest Headlines: U.S. Marshals Task Force Officer Shot, Murder Suspect Killed In Marengo County; City Of Tuscaloosa Honors More Than 90 Employees At Excellence Awards; 6 Money Hacks ...

2026-09-24 11:50 UTC
August 11, 2026—Hotpatch KB5120994 (OS Builds 26200.9106 and 26100.9106 ...

web:support.microsoft.com

This Hotpatch update for Windows 11, version 25H2 and 24H2 (KB5120994) includes security improvements. To learn more about differences between security updates, optional non-security preview updates, out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained. For information on Windows update terminology, see the different types of Windows software updates. To ...

2026-09-24 11:50 UTC
CVE: Common Vulnerabilities and Exposures

web:www.cve.org

At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures

2026-09-24 11:50 UTC
Home - The Patch Augusta Municipal Golf Course

web:www.golfthepatch.com

Now open, The Patch features a redesigned 18-hole course, led by golf course architects Tom Fazio and Beau Welling, and a new 9-hole short course, The Loop at The Patch , designed by Tiger Woods and TGR Design. Welcome to Augusta's best-in-class public golf experience.

2026-09-24 11:50 UTC
FIX Dictionary Reference - All Message Types : OnixS

web:www.onixs.biz

Easy to use online FIX messages and tag usage reference dictionary.

2026-09-24 11:50 UTC
Home - PATCH Hawaii

web:www.patchhawaii.org

PATCH provides access to registered and licensed child care, offers child care subsidies to eligible families, provides child development training and ECE scholarship opportunities, and assists those interested in starting a family child care business. PATCH is a free resource hub for families, child care professionals and communities of Hawaii.

2026-09-24 11:50 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-83555.json.

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.3,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "LOW",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-83555",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-23T10:47:18.250423Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-862",
                "description": "CWE-862 Missing Authorization",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-23T10:58:36.694Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Email Subscribers & Newsletters",
          "vendor": "Unknown",
          "versions": [
            {
              "lessThan": "5.9.35",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Usama Arshad"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "WPScan"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Email Subscribers & Newsletters  WordPress plugin before 5.9.35 does not verify the per-subscriber management token before changing a subscriber's subscription status, allowing unauthenticated users to force-unsubscribe or force-confirm an arbitrary subscriber whose email address they know."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-862 Missing Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-23T06:00:16.279Z",
        "orgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81",
        "shortName": "WPScan"
      },
      "references": [
        {
          "tags": [
            "exploit",
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://wpscan.com/vulnerability/54cb2a98-7860-40dd-817e-1294317084aa/"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Email Subscribers by Icegram Express < 5.9.35 - Unauthenticated Subscription Status Change via Missing Token Verification",
      "x_generator": {
        "engine": "WPScan CVE Generator"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bfdd5d7-9bf6-4a53-96ea-42e2716d7a81",
    "assignerShortName": "WPScan",
    "cveId": "CVE-2026-83555",
    "datePublished": "2026-09-23T06:00:16.279Z",
    "dateReserved": "2026-08-31T18:29:23.814Z",
    "dateUpdated": "2026-09-23T10:58:36.694Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}