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CVE Record

CVE-2021-25969: Camaleon CMS - Stored Cross-Site Scripting (XSS) in Comments

In Camaleon CMS application, versions 0.0.1 to 2.6.0 are vulnerable to stored XSS, that allows an unauthenticated attacker to store malicious scripts in the comments section of the post. These scripts are executed in a victim’s browser when they open the page containing the malicious comment.

MediumCVSS 6.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

Camaleon CMS sites with unauthenticated post comments can store attacker-supplied script content. When someone views the affected post page, the script can run in that person’s browser, risking account actions, session exposure, or content tampering depending on the viewer’s privileges.

Executive priority

Treat as a moderate web application risk. Prioritize internet-facing sites with active comments, especially where privileged staff view public pages while logged in. This is not documented as actively exploited in the supplied sources, but stored XSS can create persistent user-facing risk.

Technical view

CVE-2021-25969 is stored XSS in Camaleon CMS comments, reported for versions 0.0.1 through 2.6.0. The CVSS 3.1 score is 6.1, with network access, low complexity, no privileges, required user interaction, changed scope, and low confidentiality/integrity impact.

Likely exposure

Exposure is most likely on public Camaleon CMS sites that allow unauthenticated users to submit comments on posts. Higher business risk exists where administrators, editors, or authenticated users view public comment pages while signed in.

Exploitation context

The bundle does not show CISA KEV listing or any cited evidence of active exploitation. Exploitation requires a malicious comment to be stored and a victim to open the affected page. No exploit status beyond the public vulnerability description is supported here.

Researcher notes

Evidence supports CWE-79 stored XSS in the comments feature. The public bundle cites a GitHub commit but does not name a fixed release. Avoid assuming exploit prevalence or remediation version without vendor confirmation.

Mitigation direction

  • Identify all Camaleon CMS deployments and confirm whether comments are publicly enabled.
  • Check vendor guidance and the referenced upstream commit for the confirmed fix path.
  • Upgrade only to a vendor-confirmed fixed version or supported patched build.
  • Temporarily moderate, restrict, or disable unauthenticated comments until remediation is complete.
  • Remove suspicious historical comments after validating exposure.

Validation and detection

  • Confirm deployed Camaleon CMS versions, prioritizing versions 0.0.1 through 2.6.0.
  • Verify whether unauthenticated users can submit post comments.
  • Review rendered comment output for proper HTML/script sanitization behavior.
  • Confirm the referenced fix or vendor-confirmed update is present in deployed code.
  • Review logs and stored comments for suspicious submissions during the exposure window.
Prepared
Confidence
high
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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 · medium confidence lookup

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.

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cve · low confidence lookup

CVE-2021-25969 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.1 (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:N

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
6.1CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N2.82.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

6.1Medium
CVSS 3.1 vector shape for CVE-2021-25969Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
camaleon_cmscamaleon_cms0.0.1, unspecifiedListed
Weakness

CWE details

CWE-79

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-79 · source CWE mapping

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.

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