Evidence Explained says (in section 3.36)
'News clippings in private collections often do not identify the newspaper or the date the item was published. When this occurs, you should note the absence of that information and add the provenance of the item. That provenance will typically include the identity of the current owner and how that owner came to acquire it.'
Here's a sample:
"F. J. Hensel, Sr., Is Dead at 80," undated clipping, ca. mid-1950s, from unidentified newspaper; Walls Family Papers, privately held by Patricia (Walls) Stamm. [I deleted the address; presumably you'll link to your profile] Inherited in 1992 by Mrs Stamm from her mother Stella (Paddock) Walls, wife of John M. Walls of Wilmington, Delaware.'
You can, of course add the information on the clipping.
Since you don't know the copyright status of the article, I would say that you should not upload an image. But you can, of course, summarize the content.
(edited to add a clarification)