Security readout for executives and security teams
Plain-English summary
WonderCMS 3.1.3 has an SSRF issue in its theme/plugin repository installer path. The CVE description says a crafted URL can lead to arbitrary code execution. That raises server compromise risk for exposed WonderCMS sites, but the bundle does not provide CVSS, confirmed affected CPEs, or official fixed-version details.
Executive priority
Treat this as high priority for any internet-facing WonderCMS site because the reported outcome is code execution. Prioritize inventory and containment first, then vendor-guided remediation. Risk is lower where WonderCMS is absent, not version 3.1.3, or installer access is tightly controlled.
Technical view
The reported flaw is in addCustomThemePluginRepository in index.php. It concerns server-side fetching of a supplied theme/plugin repository URL, allowing attacker-controlled requests and, per the CVE, arbitrary code execution. Public references include a writeup and Packet Storm entry, but the source bundle does not include full vendor advisory details.
Likely exposure
Likely exposure is WonderCMS 3.1.3 instances where the theme/plugin installer can be reached and used. The bundle’s affected-product field is incomplete, so teams should verify actual WonderCMS versions and whether installer functionality is exposed or restricted.
Exploitation context
No CISA KEV listing is provided, so active exploitation is not evidenced here. Public technical references exist, including a Packet Storm page and researcher writeup, indicating the issue has been publicly documented. One cited title describes the scenario as authenticated RCE/SSRF.
Researcher notes
Evidence supports SSRF in WonderCMS 3.1.3’s theme/plugin repository installation flow with claimed code execution impact. The record lacks CVSS, CWE, CPEs, and explicit fix metadata. Avoid assuming unauthenticated exploitation because a cited researcher title frames it as authenticated.
Mitigation direction
- Identify any WonderCMS 3.1.3 deployments.
- Check WonderCMS project guidance for a fixed supported release.
- Restrict access to theme/plugin installer functionality.
- Review installed themes and plugins for unexpected additions.
- Limit administrative access to trusted users and networks.
Validation and detection
- Confirm WonderCMS version on each deployed site.
- Verify whether theme/plugin installer access is externally reachable.
- Review logs for unusual installer or repository URL activity.
- Check site files for unexpected themes, plugins, or code changes.
- Compare remediation status against current WonderCMS guidance.
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.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCloud metadata behavior lookup
The CVE wording references SSRF or metadata access, so cloud discovery and credential material review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-35313 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://zetc0de.github.io/post/authenticated-rce-ssrf-wondercms/CVE reference · x_refsource_MISC
- https://github.com/robiso/wondercmsCVE reference · x_refsource_MISC
- https://packetstormsecurity.com/files/160310/WonderCMS-3.1.3-Code-Execution-Server-Side-Request-Forgery.htmlCVE reference · x_refsource_MISC
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.