LiveActive security incident?Get immediate response
CVE Record

CVE-2021-31676: A reflected XSS was discovered in PESCMS-V2.3.3.

A reflected XSS was discovered in PESCMS-V2.3.3. When combined with CSRF in the same file, they can cause bigger destruction.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2021-31676 is a reported reflected cross-site scripting issue in PESCMS-V2.3.3. The CVE description says impact can increase when paired with CSRF in the same file. Public metadata does not provide CVSS, affected CPEs, a fixed version, or confirmed exploitation.

Executive priority

Track as an exposure-validation item, not an emergency, unless PESCMS-V2.3.3 is internet-facing or handles privileged sessions. Escalate if vendor references confirm no patch, sensitive workflows, or active targeting.

Technical view

The public record describes reflected XSS in PESCMS-V2.3.3, with a related CSRF condition in the same file. No CWE, vulnerable endpoint, parameter, patch level, or proof of exploitation is provided in the source bundle. Treat technical detail as incomplete until verified against vendor or project references.

Likely exposure

Exposure is likely limited to organizations running PESCMS-V2.3.3 or code derived from it. The source bundle does not identify CPEs, deployment scope, hosted service exposure, or later affected versions.

Exploitation context

The CVE is not listed as KEV in the provided bundle, and no cited source confirms active exploitation. Reflected XSS generally requires a victim interaction path; the described CSRF combination may increase impact, but details are not provided.

Researcher notes

The record is sparse: no CVSS, CWE, exact endpoint, parameter, or remediation is included. Analysis should stay bounded to PESCMS-V2.3.3 unless repository evidence proves broader impact. Validate XSS and CSRF behavior in a controlled environment without publishing weaponized details.

Mitigation direction

  • Identify any PESCMS-V2.3.3 deployments or forks in use.
  • Check the PESCMS project and referenced issue for vendor guidance or fixed releases.
  • Prioritize input validation and output encoding around the referenced affected code.
  • Review CSRF protections on state-changing forms in the same area.
  • Use compensating controls only until vendor remediation is confirmed.

Validation and detection

  • Confirm whether PESCMS-V2.3.3 is deployed in production or internet-facing environments.
  • Review the referenced GitHub issue and repositories for exact affected code context.
  • Verify reflected user-controlled input is encoded in rendered responses.
  • Verify CSRF tokens protect relevant state-changing requests.
  • Review access logs for unusual request patterns targeting PESCMS paths.
Prepared
Confidence
low
Sources
5

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.

cve · low confidence lookup

CVE-2021-31676 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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.

0CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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