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PatchSiren cyber security CVE debrief

CVE-2026-15298 pechenki CVE debrief

The TelSender plugin for WordPress is vulnerable to DOM-Based Cross-Site Scripting in all versions up to, and including, 1.14.14. This is due to insufficient input sanitization when processing Telegram API responses containing attacker-controlled chat titles. This makes it possible for unauthenticated attackers to inject malicious scripts via Telegram chat titles that execute when an administrator opens the TelSender settings page and clicks the 'Tested' button. The vulnerability affects WordPress installations using the TelSender plugin.

Vendor
pechenki
Product
TelSender – Сontact form 7, Events, Wpforms, ninja forms and woocommerce to telegram bot
CVSS
HIGH 7.2
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-10
Original CVE updated
2026-07-10
Advisory published
2026-07-10
Advisory updated
2026-07-10

Who should care

Administrators and users of the TelSender plugin for WordPress should be aware of this vulnerability and take immediate action to protect their installations. This includes reviewing and updating affected systems, implementing compensating controls, and monitoring for suspicious activity.

Technical summary

The TelSender plugin for WordPress is vulnerable to DOM-Based Cross-Site Scripting (XSS) due to insufficient input sanitization when processing Telegram API responses. An attacker can inject malicious scripts via Telegram chat titles, which execute when an administrator opens the TelSender settings page and clicks the 'Tested' button. The vulnerability affects all versions up to, and including, 1.14.14 of the TelSender plugin.

Defensive priority

High

Recommended defensive actions

  • Update the TelSender plugin to the latest version
  • Implement input validation and sanitization for Telegram API responses
  • Restrict access to the TelSender settings page
  • Monitor for suspicious activity and implement logging and auditing
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-07-10T05:16:33.117Z and was last modified on 2026-07-10T17:16:54.023Z. The NVD entry is currently Deferred. Evidence is limited to public CVE and NVD information. Defenders should verify vulnerability scope and impact with additional sources.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-15298 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-15298

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-15298 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-15298

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.