Security readout for executives and security teams
Plain-English summary
This flaw lets a logged-in, low-privileged user break Camaleon CMS media uploads by submitting a crafted SVG file. It does not expose data or change content according to the supplied CVSS vector, but it can disrupt publishing workflows that depend on the media upload feature.
Executive priority
Treat this as a moderate operational risk. Prioritize remediation for public or partner-facing CMS instances where many authenticated users can upload media, because disruption could block content publishing and support workflows.
Technical view
CVE-2021-25971 is an uncaught exception issue in Camaleon CMS 2.0.1 through 2.6.0 affecting media uploads. The reported trigger is a specially crafted .svg file uploaded by a low-privileged attacker. CVSS 3.1 rates it 4.3 with network attack vector, low complexity, low privileges required, and low availability impact.
Likely exposure
Exposure is likely limited to Camaleon CMS deployments running versions 2.0.1 through 2.6.0 where authenticated low-privileged users can upload media files, especially SVGs.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Exploitation requires authenticated low-privileged access and targets availability of the media upload feature, not confidentiality or integrity.
Researcher notes
Evidence supports an availability-only issue mapped to CWE-248. The affected range comes from the source description. The bundle references a fixing commit but does not name a fixed release, so remediation should be tied to vendor guidance or confirmed code presence.
Mitigation direction
- Inventory Camaleon CMS versions and flag 2.0.1 through 2.6.0 deployments.
- Review vendor guidance and apply a release containing the referenced fix.
- Restrict media upload permissions to trusted roles until remediation is complete.
- Temporarily disallow SVG uploads if operationally acceptable.
- Monitor media upload errors for repeated SVG-related failures.
Validation and detection
- Confirm deployed Camaleon CMS versions against the affected range.
- Verify only necessary authenticated roles can upload media.
- Check whether vendor fix commit or fixed release is present.
- Review application logs for uncaught exceptions during media uploads.
- Test media upload stability in a non-production environment after remediation.
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-248: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-25971 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
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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:N/S:U/C:N/I:N/A:L2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/owen2345/camaleon-cms/commit/ab89584ab32b98a0af3d711e3f508a1d048147d2CVE reference · x_refsource_MISC
- https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25971CVE 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.
Uncaught Exception
Uncaught Exception represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.