Vulnerability-Lookup

CVE-2026-118784 (GCVE-0-2026-118784)

Vulnerability from cvelistv5 – Published: 2026-11-07 09:25 – Updated: 2026-11-07 18:06

Title

WPSpeed <= 2.6.10 - Authenticated (Subscriber+) Stored Cross-Site Scripting via User Nickname/Display Name

Summary

The WPSpeed plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.6.10 This is due to a combination of two issues in the LightImages HTML optimizer: (1) Dispatcher::runOptimize() decides whether the current request is the site's home page by comparing only the URL path from REQUEST_URI against the path of the home URL, so on a plain-permalinks install the author archive URL /?author=<ID> is treated as the home page and the LightImages optimizer runs on it; and (2) LightImages::optimize() calls html_entity_decode() across the entire serialized DOMDocument output under the default-enabled img_processing_entity_decode setting, converting any entity-encoded markup present as plain text in the page (including WordPress's rendered author title) into live HTML. This makes it possible for authenticated attackers, with Subscriber-level access and above, to store entity-encoded markup in their own nickname/display_name through the normal profile endpoint and have that markup rehydrated into executing script when any logged-out visitor loads their author archive.

Severity

6.4 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-11-07 18:00 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation

Assigner

Wordfence CNA under the mitre root

CNA scorecard C 65/100 over 2454 records in the last 180 days details

References

5 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://plugins.trac.wordpress.org/browser/wpspee…
https://plugins.trac.wordpress.org/browser/wpspee…
https://plugins.trac.wordpress.org/browser/wpspee…
https://plugins.trac.wordpress.org/changeset/3771…

Impacted products

1 product

Vendor	Product	Version	CPE status
john-dagelmore	WPSpeed – WordPress Speed, Cache & Performance Optimization (Core Web Vitals, PageSpeed 100)	Affected: 0 , ≤ 2.6.10 (semver)	guessed

Credits

poiri3r

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-118784

Vulnerability from fkie_nvd - Published: 2026-11-07 10:17 - Updated: 2026-11-07 18:17

Severity

6.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Summary

References

	URL	Tags
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/wpspeed/tags/2.6.10/src/Core/LightImages.php#L628
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/wpspeed/tags/2.6.10/src/Core/Optimize.php#L152
	security@wordfence.com	https://plugins.trac.wordpress.org/browser/wpspeed/tags/2.6.10/src/Dispatcher.php#L170
	security@wordfence.com	https://plugins.trac.wordpress.org/changeset/3771695/wpspeed/trunk/src/Core/LightImages.php
	security@wordfence.com	https://www.wordfence.com/threat-intel/vulnerabilities/id/47aa1a74-4189-4521-ba6e-e91a06b8f5a6?source=cve

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-JHR8-3VQJ-G7JJ

Vulnerability from github – Published: 2026-11-07 12:31 – Updated: 2026-11-07 12:31

Details

The WPSpeed plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.6.10 This is due to a combination of two issues in the LightImages HTML optimizer: (1) Dispatcher::runOptimize() decides whether the current request is the site's home page by comparing only the URL path from REQUEST_URI against the path of the home URL, so on a plain-permalinks install the author archive URL /?author= is treated as the home page and the LightImages optimizer runs on it; and (2) LightImages::optimize() calls html_entity_decode() across the entire serialized DOMDocument output under the default-enabled img_processing_entity_decode setting, converting any entity-encoded markup present as plain text in the page (including WordPress's rendered author title) into live HTML. This makes it possible for authenticated attackers, with Subscriber-level access and above, to store entity-encoded markup in their own nickname/display_name through the normal profile endpoint and have that markup rehydrated into executing script when any logged-out visitor loads their author archive.

Severity

6.4 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Show details on source website

JSON

To clipboard

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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-11-07T10:17:06Z",
    "severity": "MODERATE"
  },
  "details": "The WPSpeed plugin for WordPress is vulnerable to Stored Cross-Site Scripting in versions up to, and including, 2.6.10 This is due to a combination of two issues in the LightImages HTML optimizer: (1) Dispatcher::runOptimize() decides whether the current request is the site\u0027s home page by comparing only the URL path from REQUEST_URI against the path of the home URL, so on a plain-permalinks install the author archive URL /?author=\u003cID\u003e is treated as the home page and the LightImages optimizer runs on it; and (2) LightImages::optimize() calls html_entity_decode() across the entire serialized DOMDocument output under the default-enabled img_processing_entity_decode setting, converting any entity-encoded markup present as plain text in the page (including WordPress\u0027s rendered author title) into live HTML. This makes it possible for authenticated attackers, with Subscriber-level access and above, to store entity-encoded markup in their own nickname/display_name through the normal profile endpoint and have that markup rehydrated into executing script when any logged-out visitor loads their author archive.",
  "id": "GHSA-jhr8-3vqj-g7jj",
  "modified": "2026-11-07T12:31:49Z",
  "published": "2026-11-07T12:31:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118784"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wpspeed/tags/2.6.10/src/Core/LightImages.php#L628"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wpspeed/tags/2.6.10/src/Core/Optimize.php#L152"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/wpspeed/tags/2.6.10/src/Dispatcher.php#L170"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset/3771695/wpspeed/trunk/src/Core/LightImages.php"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/47aa1a74-4189-4521-ba6e-e91a06b8f5a6?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-118784 (GCVE-0-2026-118784)

FKIE_CVE-2026-118784

GHSA-JHR8-3VQJ-G7JJ

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour