rometheme RTMKit Plugin up to 2.0.7 on WordPress Advanced Heading Widget render background_text_heading cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.77+

Summaryinfo

A vulnerability labeled as problematic has been found in rometheme RTMKit Plugin up to 2.0.7 on WordPress. This affects the function render of the component Advanced Heading Widget. The manipulation of the argument background_text_heading results in cross site scripting. This vulnerability is reported as CVE-2026-8351. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in rometheme RTMKit Plugin up to 2.0.7 on WordPress. Affected is the function render of the component Advanced Heading Widget. The manipulation of the argument background_text_heading with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

The RTMKit plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the Advanced Heading widget's 'Background Text' parameter in versions up to, and including, 2.0.7 This is due to insufficient output escaping on the 'background_text_heading' setting in the render() function, which concatenates the value directly into an HTML attribute without applying esc_attr(). 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.

The weakness was disclosed by theviper17y. The advisory is shared for download at wordfence.com. This vulnerability is traded as CVE-2026-8351 since 05/11/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 2.0.4 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.9

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.4
CNA Vector (Wordfence): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: RTMKit Plugin 2.0.4

Timelineinfo

05/11/2026 CVE reserved
07/03/2026 +53 days Advisory disclosed
07/03/2026 +0 days VulDB entry created
07/03/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: wordfence.com
Researcher: theviper17y
Status: Confirmed

CVE: CVE-2026-8351 (🔒)
GCVE (CVE): GCVE-0-2026-8351
GCVE (VulDB): GCVE-100-376092

Entryinfo

Created: 07/03/2026 15:33
Changes: 07/03/2026 15:33 (69)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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