CVE-2025-23503Network attack vector

Unauthenticated script execution in victim browsers

Published Jan 22, 2025 · Updated Apr 28, 2026

Reflected XSS in the osolwordpress CAPTCHA/contact-form plugin 1.0.2 and earlier allows remote attackers to inject browser scripts. Public advisories identify insufficient input sanitization and output escaping but do not disclose the affected request parameter or code path. Exploitation requires an unauthenticated attacker to persuade a victim to open a crafted link, after which the script runs in the victim's browser context.

CVSS severity7.1
High
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in the osolwordpress CAPTCHA/contact-form plugin 1.0.2 and earlier allows remote attackers to inject browser scripts. Public advisories identify insufficient input sanitization and output escaping but do not disclose the affected request parameter or code path. Exploitation requires an unauthenticated attacker to persuade a victim to open a crafted link, after which the script runs in the victim's browser context.

The record

CVE
CVE-2025-23503
Published
Jan 22, 2025
Updated
Apr 28, 2026
Vendor
osolwordpress
Product
Customizable Captcha and Contact Us
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 28, 2026Record 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 <=1.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

osolwordpress · Customizable Captcha and Contact Usversion=0 <=1.0.2

Published CVSS scores

6.1WordfenceCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
7.1PatchstackCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

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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