CVE-2025-9873: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in a3rev a3 Lazy Load
The a3 Lazy Load plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 2.7.5 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
AI Analysis
Technical Summary
The a3 Lazy Load WordPress plugin contains a stored XSS vulnerability (CWE-79) due to improper neutralization of input during web page generation. Authenticated attackers with contributor or higher privileges can inject arbitrary JavaScript into pages via insufficient input sanitization and output escaping. This vulnerability affects all versions up to and including 2.7.5. The CVSS 3.1 base score is 6.4, reflecting network attack vector, low attack complexity, privileges required, no user interaction, and impacts on confidentiality and integrity with scope change. No patch or official fix has been disclosed yet.
Potential Impact
An attacker with contributor-level access or higher can inject malicious scripts that execute in the context of users visiting the affected pages. This can lead to unauthorized actions, data theft, or session hijacking limited to the scope of the affected site. The vulnerability does not impact availability. There are no known exploits in the wild currently.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict contributor-level access to trusted users only and consider removing or disabling the a3 Lazy Load plugin if possible. Monitor for updates from the vendor regarding patches or official mitigations.
CVE-2025-9873: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in a3rev a3 Lazy Load
Description
The a3 Lazy Load plugin for WordPress is vulnerable to Stored Cross-Site Scripting in all versions up to, and including, 2.7.5 due to insufficient input sanitization and output escaping on user supplied attributes. This makes it possible for authenticated attackers, with contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The a3 Lazy Load WordPress plugin contains a stored XSS vulnerability (CWE-79) due to improper neutralization of input during web page generation. Authenticated attackers with contributor or higher privileges can inject arbitrary JavaScript into pages via insufficient input sanitization and output escaping. This vulnerability affects all versions up to and including 2.7.5. The CVSS 3.1 base score is 6.4, reflecting network attack vector, low attack complexity, privileges required, no user interaction, and impacts on confidentiality and integrity with scope change. No patch or official fix has been disclosed yet.
Potential Impact
An attacker with contributor-level access or higher can inject malicious scripts that execute in the context of users visiting the affected pages. This can lead to unauthorized actions, data theft, or session hijacking limited to the scope of the affected site. The vulnerability does not impact availability. There are no known exploits in the wild currently.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict contributor-level access to trusted users only and consider removing or disabling the a3 Lazy Load plugin if possible. Monitor for updates from the vendor regarding patches or official mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2025-09-02T21:09:27.142Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 693cef67d977419e584a5284
Added to database: 12/13/2025, 4:45:27 AM
Last enriched: 4/9/2026, 9:51:21 PM
Last updated: 5/10/2026, 1:48:56 PM
Views: 168
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