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CVE-2017-20207

32
FAUCET Score

CVE-2017-20207 is a critical PHP Object Injection vulnerability affecting the Flickr Gallery plugin for WordPress, versions up to and including 1.5.2. This flaw allows unauthenticated attackers to inject PHP objects via the 'pager' parameter due to insecure deserialization of untrusted input. With a CVSS score of 9.8, the vulnerability poses a severe risk, enabling remote code execution and potentially leading to full system compromise. While there is no public exploit code available on Metasploit, Nuclei, or ExploitDB, attackers were actively exploiting this vulnerability to create backdoors using the WP_Theme() class. Despite active exploitation, there is minimal community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.5.2CPE matchmatch criteria
cpe:2.3:a:dancoulter:flickr_gallery:*:*:*:*:*:wordpress:*:*
>= 0, < 1.5.3CPE match
cpe:2.3:a:dancoulter:flickr_gallery:*:*:*:*:*:wordpress:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.69%
Probability of exploitation in next 30 days
EPSS Percentile
48.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0069 is in the 31st percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

plugins.trac.wordpress.org / changeset/1737576/flickr-gallery
Patch
wordfence.com / blog/2017/10/3-zero-day-plugin-vulnerabilities-exploited-wild
Press/Media CoverageThird Party Advisory
wordfence.com / threat-intel/vulnerabilities/id/b52ae51d-7b9a-4047-82bf-723ea87d2375
Third Party Advisory