Security readout for executives and security teams
Plain-English summary
A WordPress plugin called Simple Stripe Checkout, used to accept Stripe payments, has a flaw that lets attackers craft a malicious link. If a site visitor or admin clicks it, the page can run attacker-controlled scripts in their browser. This could be used to steal sessions, hijack admin actions, or trick customers on a checkout page.
Executive priority
Treat as a high priority for any site that processes payments via this plugin. Reflected XSS on a checkout flow can damage customer trust and support fraud, even without active exploitation reports. Direct the web team to inventory affected sites this week and remove or patch the plugin pending vendor guidance.
Technical view
CVE-2025-49963 is a Reflected Cross-Site Scripting (CWE-79) vulnerability in the growniche Simple Stripe Checkout plugin for WordPress, affecting versions up to and including 1.1.28. CVSS 3.1 base score is 7.1 (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L). Exploitation requires user interaction with a crafted URL; the scope-changed vector indicates impact can extend to the broader WordPress site context.
Likely exposure
Any WordPress site running Simple Stripe Checkout at version 1.1.28 or earlier is exposed. Public-facing checkout and admin pages are the most likely targets. The Patchstack advisory does not currently cite a fixed version, so all installations should be treated as potentially vulnerable until vendor guidance confirms otherwise.
Exploitation context
Not listed in CISA KEV and no public reports of active exploitation are cited in the source bundle. Exploitation requires a victim to click an attacker-crafted link (UI:R), but no authentication is needed (PR:N). Reflected XSS in a payment-related plugin is attractive for phishing, session theft, and customer-facing fraud scenarios.
Researcher notes
CVSS scope-changed (S:C) with UI:R and PR:N is consistent with reflected XSS that can pivot beyond the plugin's component into the broader WordPress origin. The CVE record lists affected versions as "0" with defaultStatus unaffected, which is typical Patchstack metadata and should not be read as "no versions affected"; the advisory text confirms <= 1.1.28 is impacted. No fixed version is cited in the bundle, so verify vendor release notes before declaring closure.
Mitigation direction
- Inventory all WordPress sites and identify any using the Simple Stripe Checkout plugin.
- Check Patchstack and the plugin vendor page for a patched release and apply it once published.
- If no patch is available, deactivate and remove the plugin until a fix is released.
- Add WAF rules to filter reflected XSS patterns on URLs targeting plugin endpoints.
- Restrict plugin admin pages to trusted IPs and require MFA on WordPress administrator accounts.
Validation and detection
- Query plugin inventory to confirm Simple Stripe Checkout version <= 1.1.28 is not installed.
- Review web server and WAF logs for suspicious URLs containing script payloads against plugin paths.
- Confirm WordPress and plugin auto-updates are enabled or that update tickets are open.
- Re-scan the site with an authenticated WordPress vulnerability scanner after remediation.
- Verify the Patchstack advisory page for an updated fixed version and CVE status.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-79: User-session and phishing behavior lookup
Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2025-49963 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L2.83.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.1HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Source materials
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.