Why, there is only One Source of Tradition. ;-)
Honestly, I believe that some saints have been given sitgmata. I think it's a real thing and not fraud or the devil.
That a great saint like Paul may have been gifted is not out of the realm of possibility and this seems to support that. But I am not certain if this is so or not.
SD
While not addressing specifically the case of St. Paul, from the time information on stigmata was compiled, here is the official list, compliments of catholic.org
2. There are 62 saints or blessed of both sexes of whom the best known were:
St. Francis of Assisi (1186-1226)
St. Lutgarde (1182-1246)
St. Margaret of Cortona (1247-97)
St. Gertrude (1256-1302)
St. Clare of Montefalco (1268-1308)
Bl. Angela of Foligno (d. 1309)
St. Catherine of Siena (1347-80)
St. Lidwine (1380-1433)
St. Frances of Rome (1384-1440)
St. Colette (1380-1447)
St. Rita of Cassia (1386-1456)
Bl. Osanna of Mantua (1499-1505)
St. Catherine of Genoa (1447-1510)
Bl. Baptista Varani (1458-1524)
Bl. Lucy of Narni (1476-1547)
Bl. Catherine of Racconigi (1486-1547)
St. John of God (1495-1550)
St. Catherine de' Ricci (1522-89)
St. Mary Magdalene de' Pazzi (1566-1607)
Bl. Marie de l'Incarnation (1566-1618)
Bl. Mary Anne of Jesus (1557-1620)
Bl. Carlo of Sezze (d. 1670)
Blessed Margaret Mary Alacoque (1647-90)
St. Veronica Giuliani (1600-1727)
St. Mary Frances of the Five Wounds (1715-91)
St. Pio of Pietrelcina (Padre Pio) (1887-1968)
3. There were 20 stigmatics in the nineteenth century. The most famous were:
Catherine Emmerich (1774-1824)
Elizabeth Canori Mora (1774-1825)
Anna Maria Taïgi (1769-1837)
Maria Dominica Lazzari (1815-48)
Marie de Moerl (1812-68) and Louise Lateau (1850-83)
And, then there is the modern day mystic, Maria Esperanza from Venezuela. Mrs. Maria Esperanza is considered by many, one of the greatest mystics of these times. In the midst of her household chores as a wife, mother and grandmother to nineteen grandchildren, God continues to bestow upon her extraordinary gifts and charismata: The stigmata, visions of the future or the gift of prophecy, the gift of healing, appearance or "materialization" of a Holy Host in her mouth, emission of scents of flowers and fruits, apparition of rose petals, levitation, bilocation. And maybe one of the most impressive mystical phenomena: The birth of a rose, or a rose which sprouts out spontaneously from her chest, a phenomenon which now has taken place sixteen times. Some claim to see rose petals fall from the sky around her, not just the smell of roses.
During her younger years Esperanza made the acquaintance of Padre Pio, the most famous mystic since Francis of Assisi, who had told people he expected to be visited by an extraordinary woman. “There is a young woman who is going to come from South America,” Pio said. “When I leave, she will be your consolation.” When finally they met, Maria would hear his “call” even though she was far away near Rome and she would head for his monastery at San Giovanni Rotundo on the barren east side of Italy – where despite throngs waiting to see him the aged priest called out, “Esperanza!”
On September 23, 1968, Maria had a vision of Padre Pio. “Esperanza,” he said in the vision, “I have come to say good-bye. My time has come. It is your turn.” As this was happening Geo watched with amazement as his wife’s face transfigured into that of the Italian priest. The next day they saw in the newspaper that Pio (whose funeral would be attended by more than a million) had died.