CVE-2021-25117Public exploitNetwork attack vector

Administrator-level stored XSS via unsanitized image option

Published Jan 16, 2024 · Updated Jun 17, 2025

Stored XSS in WP-PostRatings before 1.86.1 allows remote authenticated users to execute scripts via the postratings_image option. The Ratings options page stores postratings_image without sanitization, and rating markup emits the value without output escaping. Administrator access and a valid nonce are required; exploitation remains possible when unfiltered_html is disabled, and scripts run when a user loads an injected page.

CVSS severity4.8
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in WP-PostRatings before 1.86.1 allows remote authenticated users to execute scripts via the postratings_image option. The Ratings options page stores postratings_image without sanitization, and rating markup emits the value without output escaping. Administrator access and a valid nonce are required; exploitation remains possible when unfiltered_html is disabled, and scripts run when a user loads an injected page.

The record

CVE
CVE-2021-25117
Published
Jan 16, 2024
Updated
Jun 17, 2025
Vendor
Lester 'GaMerZ' Chan
Product
WP-PostRatings
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Jan 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 17, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.86.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Lester 'GaMerZ' Chan · WP-PostRatingsversion=0 <1.86.1

Published CVSS scores

5.5WordfenceCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
4.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007JavaScript/JScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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