Security readout for executives and security teams
Plain-English summary
CVE-2025-31604 is a stored cross-site scripting issue in the WordPress Cal.com plugin through version 1.0.0. A lower-privileged authenticated user could store script content that runs when another user views the affected page. The business risk is account abuse, misleading content, or data exposure inside WordPress administration or site workflows.
Executive priority
Treat this as a moderate-priority WordPress application risk. Prioritize sites where untrusted users have accounts or where WordPress administrators handle sensitive customer, booking, or operational data. Absence from KEV lowers emergency urgency, but stored XSS should not be left unresolved.
Technical view
The CVE describes CWE-80 improper neutralization of script-related HTML tags, with CVSS 3.1 score 6.5. The vector is network-accessible, low complexity, requires low privileges and user interaction, changes scope, and has low confidentiality, integrity, and availability impact. The public bundle does not provide affected code paths or a patched version.
Likely exposure
Exposure appears limited to WordPress sites running the Cal.com plugin at version 1.0.0 or earlier. The sources do not indicate impact to Cal.com SaaS or unrelated Cal.com products. Sites without this plugin are not indicated as exposed by the provided evidence.
Exploitation context
No provided source reports active exploitation, and the CVE is not listed as KEV in the bundle. The vulnerability requires an attacker with low privileges and requires another user to interact with affected content. Stored XSS can still be operationally important in WordPress because administrative sessions are valuable targets.
Researcher notes
Evidence is sparse. The bundle identifies stored XSS in the WordPress Cal.com plugin through 1.0.0, CWE-80, and CVSS details, but not vulnerable parameters, exploit availability, or fixed versions. Avoid assuming remediation beyond checking vendor/Patchstack guidance and reducing exposure.
Mitigation direction
- Inventory WordPress sites for the Cal.com plugin and installed version.
- Disable or remove the plugin if version 1.0.0 or earlier is present.
- Check Cal.com and Patchstack guidance for a patched release or official workaround.
- Limit plugin management and content-editing privileges to trusted users.
- Review WordPress roles and revoke unnecessary low-privilege accounts.
Validation and detection
- Confirm whether the Cal.com WordPress plugin is installed on each WordPress site.
- Record the installed plugin version and compare it to <= 1.0.0.
- Review CVE and Patchstack entries for updated remediation information.
- Check recent WordPress user and content changes for unexpected activity.
- Verify any deployed update or removal in staging before production rollout.
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-80: 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-2025-31604 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
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/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:L/UI:R/S:C/C:L/I:L/A:L2.33.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/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 Script-Related HTML Tags in a Web Page (Basic XSS)
Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.