CVE-2017-20207 (GCVE-0-2017-20207)

Vulnerability from cvelistv5 – Published: 2025-10-18 03:33 – Updated: 2026-04-08 17:17
VLAI KEVintel KEV
Title
Flickr Gallery <= 1.5.2 - Unauthenticated PHP Object Injection
Summary
The Flickr Gallery plugin for WordPress is vulnerable to PHP Object Injection in versions up to, and including, 1.5.2 via deserialization of untrusted input from the `pager ` parameter. This allows unauthenticated attackers to inject a PHP Object. Attackers were actively exploiting this vulnerability with the WP_Theme() class to create backdoors.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Dan Coulter Flickr Gallery Affected: 0 , < 1.5.3 (semver)
Create a notification for this product.
Credits
Matt Barry
KEVintel KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: ac11df37-e20a-47eb-ba85-4fedbb451cbb

Vulnerability ID: CVE-2017-20207

Status: Confirmed

Status Updated: 2026-06-01 10:42 UTC

Exploited: Yes

Timestamps
First Seen: 2026-06-01
Asserted: 2026-06-01
Scope
Notes: KEVIntel entry: Flickr Gallery <= 1.5.2 - Unauthenticated PHP Object Injection | Affected: Dan Coulter / Flickr Gallery | CVSS: 9.8 (CRITICAL) | EPSS: 0.0067 | Used in malware: unknown | Not yet in CISA KEV: True
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Flickr Gallery <= 1.5.2 - Unauthenticated PHP Object Injection
Vendor Dan Coulter
Product Flickr Gallery
Added Date 2026-06-01T10:42:26.138Z
Cvss Score 9.8
Epss Score 0.0067
Cvss Severity CRITICAL
Epss Percentile 0.47116
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev True
References
Created: 2026-06-19 12:45 UTC | Updated: 2026-06-19 12:45 UTC
Show details on NVD website
To clipboard 

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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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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