Cross-site scripting vulnerability in Captcha prior to version 4.3.0, Car Rental prior to version 1.0.5, Contact Form Multi prior to version

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• bestwebsoft captchaup to 4.2.9 inclusive
• bestwebsoft car rentalup to 1.0.4 inclusive
• bestwebsoft contact formup to 4.0.5 inclusive
• bestwebsoft contact form multiup to 1.2.0 inclusive
• bestwebsoft contact form to dbup to 1.5.6 inclusive
• bestwebsoft custom admin pageup to 0.1.1 inclusive
• bestwebsoft custom fields searchup to 1.3.1 inclusive
• bestwebsoft custom searchup to 1.35 inclusive
• bestwebsoft donateup to 2.1.0 inclusive
• bestwebsoft email queueup to 1.1.1 inclusive
• bestwebsoft error log viewerup to 1.0.5 inclusive
• bestwebsoft facebook buttonup to 2.53 inclusive
• bestwebsoft featured postsup to 1.0.0 inclusive
• bestwebsoft galleryup to 4.4.9 inclusive
• bestwebsoft gallery categoriesup to 1.0.8 inclusive
• bestwebsoft google +1up to 1.3.3 inclusive
• bestwebsoft google adsenseup to 1.43 inclusive
• bestwebsoft google analyticsup to 1.7.0 inclusive
• bestwebsoft google captcha (recaptcha)up to 1.27 inclusive
• bestwebsoft google mapsup to 1.3.5 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (jpcert). Independent of NVD's CPE analysis and usually ahead of it.

• BestWebSoft Captcha

  • prior to version 4.3.0affected

• BestWebSoft Car Rental

  • prior to version 1.0.5affected

• BestWebSoft Contact Form

  • prior to version 4.0.6affected

• BestWebSoft Contact Form Multi

  • prior to version 1.2.1affected

• BestWebSoft Contact Form to DB

  • prior to version 1.5.7affected

• BestWebSoft Custom Admin Page

  • prior to version 0.1.2affected

• BestWebSoft Custom Fields Search

  • prior to version 1.3.2affected

• BestWebSoft Custom Search

  • prior to version 1.36affected

• BestWebSoft Donate

  • prior to version 2.1.1affected

• BestWebSoft Email Queue

  • prior to version 1.1.2affected

• BestWebSoft Error Log Viewer

  • prior to version 1.0.6affected

• BestWebSoft Facebook Button

  • prior to version 2.54affected

Other highest-scoring records for the same primary product.

• CVE-2023-45771WordPress Contact Form With Captcha plugin <= 1.6.8 - Reflected Cross Site Scripting (XSS) vulnerability
  28Monitor
• CVE-2014-9283The BestWebSoft Captcha plugin before 4.0.7 for WordPress allows remote attackers to bypass the CAPTCHA protection mechanism and obtain admi
  21Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

User content is inserted into the page as HTML. The browser interprets the content as code rather than data.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1commentEl.innerHTML = comment.body;

1commentEl.textContent = comment.body;

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.